Electrostatics

A charge of two microcoulombs (2 μC) moves with velocity of two meter per second (2 m/sec) in the direction of two Tesla magnetic field. The force that will act on it will be:

In Milikan's Method, the radius of droplet can be calculated by:

The work done in moving a unit positive charge from one point to another against the electric field is a measure of:

SI unit of electric flux is:

The magnitude of an electric field between two separated plates can be calculated by the relation:

Electric intensity is a vector quantity and its direction is:

The electrical analog of mass in electricity is _______.

SI unit of charge is ________.

If the length, width, and separation between the plates of a parallel plate capacitor are doubled, then its capacitance becomes:

The unit for electric charge is the coulomb, and one Coulomb in terms of the base unit is equivalent to:

2.00 x 10⁶ e passing through a conductor in 1 millisecond. Electric current through conductor is:

Electric field strength at position vector caused by point charge placed at origin is:

The Coulomb's force between two point charges q₁ = 1C and q₂ is 2N. Where the distance between them is 3m, the charge q₂ is:

How much power is used in moving a 0.03 C charge from point A at a potential of 40 V to point B at 60 V, if this takes 2 seconds?

The force of repulsion between two charges is considered as:

A negatively charged particle initially at rest is placed in an electric field that varies from point to point. There are no other fields. Then:

A particle, carrying a charge of 5e, falls through a potential difference of 25 V. What would be energy acquired by the particle in ‘J’.

Electric forces change the magnitude and direction of velocity while magnetic forces change _ of velocity.

A capacitor of capacitance C has charge Q and stored energy is W. lf the charge is increase to 2Q. The stored energy will be:

A charged particle is moving in a uniform electric field. For the motion of the particle due to the field, which quantity has a constant non-zero value?

The coulomb's constant k depends upon:

Which one of the following statements is true?

What is the potential difference between two point in an electric field if it takes 600J of energy to move a charge of 2C between two points?

A capacitor is charged with a battery and energy stored is u. After disconnecting battery another capacitor of same capacity is connected in parallel to the first capacitor. Then energy stored in each capacitor is

As per Coulomb's law, the force of attraction or repulsion between two-point charges is directly proportional to the:

Electric field intensity inside a hollow charged sphere is:

Gauss law cannot be used to find which of the following quantity?

A charged particle moves in a uniform electric field between two oppositely charged parallel metal plates. To calculate the force acting on the particle due to the electric field, which quantity is not required?

What is the potential difference between two points in an electric field if it takes 600 J of energy to move a charge of 2 C between these two points?

To store the electric charge the ultra-capacitors use _______ effect.

A capacitor of capacitance 'C' has a charge 'Q' and stored energy is W. If the charge is increased to '2Q'. The stored energy will be:

Find the potential difference in moving a 2 C charge, which requires 600 J of work between two points.

Electric intensity between two oppositely charge plates in the middle region is:

The S.I unit of capacitance of a capacitor is:

The formula V = W / q₀ represents:

The Coulomb's law states:

Which one of the following is NOT a feature of electric forces?

If the surface charge density of an infinite sheet increases by 25% the electric field intensity:

If a plastic sheet of relative permittivity 2.5 is inserted between two point charges placed in a vacuum, then the electrostatic force between them

The electric field at a point due to two equal and opposite charges is 100 N/C. If the magnitude of each charge is doubled then the electric field at that point becomes:

If the distance between two charges is halved and magnitude of charges are also doubled, then the force between these charges becomes:

For two equal positive charges, the electric field weakest?

If we double the separation between two charges then Coulomb's force will become:

Two capacitors C₁=3µF and C₂=6µF are in series across a 90 volts D.C. supply. The total capacitance is given by:

A hollow charged metal sphere has a radius of r. If the potential difference between its surface and a point at a distance 3r from the center is V, then electric field intensity at a distance 3r from the center is:

A neutron, a proton, and an electron are placed in a uniform electric field. The:

Two bodies are charged by rubbing one against the other. During the process, one becomes positively charged while the other becomes negatively charged. Then:

Consider the charge configuration of a spherical Gaussian surface as shown in the figure. When calculating the flux of the electric field over the spherical surface, the electric field will be due to:

How many electrons should be removed from a coin of mass 1.6 g, so that it may float in an electric field intensity of 109 N/C which is directed upwards?

The formula for electric field strength is ‘E = F/Q’, where E is electric field strength and F is force and Q is the charge. Which one of the following options gives the correct base units for electric field strength?

What is the charge stored on a 5 μF capacitor charged to the potential difference of 12 V?

The net charge flowing through any section of the conductor per unit time is known as:

A particle carrying a charge of 2e falls through a potential difference of 3.0 V. Calculate the energy acquired by it.

Two capacitors C₁=3uF and C₂=6uF are in series across a 90 volts D.C. supply. The total capacitance is given by:

Two capacitors C₁ = 2μF and C₂ = 4μF, are connected in series across a 100 V supply. Find the effective capacitance.

The electric field strength between a pair of plates is "E" If the separation of the plates is doubled and the potential difference between the plates is increased by a factor of four, the new field strength is:

Electric potential due to a 2µC charge at a distance of one meter is equal to:

Three times decrease in the distance between the plates of a parallel plate capacitor will _.

The study of electric charges at rest in an electric field is _.

When a charge experiences a force, there will be a _ field developed.

You have three capacitors, each of 2µF. In which of the following combinations of the three capacitors is the resultant capacitance 6µF?

“The magnitude of the electrostatic force between two point charges is directly proportional to the product of the magnitude of the charges and inversely proportional to the square of the distance between them.” This is known as:

The values of electric intensity will _ due to the presence of a dielectric medium.

A sphere of charge +Q is fixed in a position. A smaller sphere of +q is placed near the larger sphere and released from the rest. The small sphere will move away from the large sphere with:

Two capacitors C₁=3 uF and C₂=6 uF are in series across a 90 volts D.C. supply. The total capacitance is given by:

The given diagram shows a capacitive circuit. Which of the following vector diagrams shows the current lead in a capacitive circuit?

The flux through a surface will be minimal when the angle between E and △A is:

Electric Flux through the surface of a sphere which has constant charge at its center depends on:

The electric flux through the surface of the sphere is directly proportional to the:

The change in potential energy per unit charge between two points in an electric field is called:

The SI unit of charge is:

The device used to store a charge is called:

The force per unit charge is called:

The flux through a surface will be zero when the angle between E and △A is:

When a charge gets influenced by its surroundings, it has entered:

Electric Potential which is measured with respect to the zero potential is called:

Change in P.E per unit charge in the electric field is:

In capacitors, energy is stored in the form of:

Two capacitors C₁ (12 F) and C₂ (24 F) are connected in series across a 36 V supply. The charge stored on each of them will be:

If a dielectric is placed between two plates of a capacitor, the net capacitance:

Two plates are at potentials 20V and -20V respectively with a separation of 2cm between them. The electric field between them is:

An electric dipole is situated in a non-uniform electric field. It may experience:

Two capacitors C₁ (6µF) and C₂ (12µF) are in series across a 180 volts D.C supply. Calculate the charges on C₁ and C₂ respectively.

Before thunder, the hair stands on end. A hair with a mass of 0.50 ng and a charge of 1.0 pC is supported by a force other than the weight of the hair and the electric force. What is the electric field strength?

What happens when a charge is placed on a soap bubble?

The electric field strength between a pair of plates is "E". If the separation of the plates is doubled and the potential difference between the plates is increased by a factor of four, the new field strength is:

If there are "n" capacitors each of capacity "c" connected in parallel to "V" volts source then the energy stored is equal to:

Doubly ionized atoms 𝑋 and 𝑌 of two different elements are accelerated through the same P.D. on entering a uniform magnetic field they describe circular paths of radii 𝑅1 and 𝑅2. The masses of 𝑋 and 𝑌 are in the ratio of:

There are two charges +2𝜇𝐶 and -3𝜇𝐶. The ratio of the force acting on them will be:

The inward and outward electric flux from a closed surface is respectively 8×103units and 4×103 units, then the net charge inside the closed surface is:

To determine the resistance of a voltmeter by discharging a capacitor through it, the instantaneous voltage is then given by the relation:

The number of electrons in one coulomb of charge are:

In a uniform electric field, which statement is correct?

What is the magnitude of a point charge which produces an electric field of 2 N/C at a distance of 60 cm?

A negatively charged particle initially at rest is placed in an electric field that varies from point to point. There are no other fields. Then:

What is the charge stored on a 5 μF capacitor charged to a potential difference of 12 V?

The difference between the plates of a parallel plate capacitor is 2.0 mm and the area of each plate is 2.0 m². The plates are in a vacuum. A potential difference of 1.0x104 V is applied across the plates. Find the capacitance.

The formula for electric field strength is ‘E = F/Q’, where E is electric field strength and F is force and Q is a charge. Which one of the following options gives the correct base units for electric field strength?

10 V potential difference is applied across the plate of the 1 µF capacitor. What is the energy stored in the capacitor?

What will be the effect on the capacitance of a capacitor if the area of each plate is doubled while the separation between the plates is halved?

Energy stored in a capacitor is given by:

Capacitance is given by:

What effect does a dielectric have on the capacitance of a capacitor?

The capacitance of a spherical resistor is:

If there is a frictional force between two surfaces, then which of the following will be created?

What is a capacitor?

Which of the following fields does not affect the velocity of a charged particle?

For a parallel plate capacitor, the energy density is _.

The study of electric charges at rest in an electric field is:

Two-point charges are at a distance d. If the force between these two charges is F, what is the force between the charges when the distance between them is 3d?

Forces acting on a negative charge are always _.

The force between two charges Q and q separated by a distance d, is F. What will be the force between them when the distance between them is d/2?

The electric potential difference between two points can be defined as:

If a particle having a charge q is accelerated through a potential difference V, then the energy acquired by the particle is _.

An electron is held within an electric field. What happens when the electron is released?

The time constant is defined as the time required by the capacitor _.

The force between two charges Q and q, separated by a distance d is F. What will be the force between them when the distance between them is d/2?

Electric intensity at the center of uniformly distributed charge is:

Electric field lines due to a positive charge are _.

Aluminum is _.

If the potential difference across the two plates of a parallel plate capacitor is doubled, then the energy stored in the capacitor would:

You have two identical capacitors. They can be connected in series or parallel. If you want the smallest equivalent capacitance for the combination, how should you connect them?

You have three capacitors, each of 2 μC. In which of the following combinations of the three capacitors, the resultant capacitance is 6μC?

The study of electric charges at rest in an electric field is known as:

A capacitor stores 5.3 x 10-5 C of charge when connected to a 6.0-V battery. How much charge does the capacitor store when connected to a 9.0-V battery?

A particle carrying a charge 3e accelerates through a potential difference of 2V. The energy acquired by it is:

Force on a static charge q in uniform electric field E is:

Electric field lines from a point charge _ each other.

The electric potential at infinite distance is:

One coulomb charge is carried by:

You have three capacitors, each of 3 μC. In which of the following combinations of the three capacitors, the resultant capacitance is 1μC?

The electric intensity between two oppositely charged electric plates is:

A charge is moving with velocity v, it enters a uniform electric field E. The direction of v and E are not parallel. What is the path of the charged particle inside the electric field?

The value of the Coulomb constant is:

A particle having a charge of 20 electrons on it, falls through a potential difference of 100 volts. Calculate the energy acquired by it in electron volts (eV).

Farad is defined as:

The units of electric intensity are:

Consider a negative point charge moving along a straight-line path directly toward a stationary positive point charge. Which aspect(s) of the electric force on the negative point charge will remain constant as it moves?

Consider two capacitors with capacitance 2µF and 4µF. With which type of connection will the 4µF capacitor have a greater amount of stored energy than the 2µF capacitor?

The electric field at a point varies as r0 for:

For static electric field:

The value for εr for air is:

Object A has a charge of 15 mC, and object B has a charge of 10 mC. Which statement is true about the electric forces on the objects?

If the potential difference across the two plates of a parallel plate capacitor is doubled, then the energy stored in the capacitor would be:

For a parallel plate capacitor, the energy density is:

Consider a charge q is placed in a region where both electric and magnetic fields are present. The charge will experience:

Three charges +3q, +q, and Q are placed on a straight line with equal separation. To make the net force on q to be zero, the value of Q will be?

Consider a capacitor that has a vacuum in the space between the conductors. If we double the amount of charge on each conductor, what happens to the capacitance?

The value of K depends upon _.

If a force of 2 N is applied on charge of 3 Coulomb, the electric field becomes _.

A negative point charge is moving along a circular orbit around a positive point charge. Which aspect(s) of the electric force on the negative point charge will remain constant as it moves?

The minimum charge on an object can not be less than _.

A capacitor of capacitance C is connected with resistance R. The time constant of the circuit would be:

An electron is held within electric field. What happens when electron is released?

You have three capacitors, each of 2 μC. In which of the following combinations of the three capacitors, is the resultant capacitance 3μC?

Coulomb's law is only applicable for _.

Photocopier and ink-jet printer are applications of _.

The unit of electric field strength is _.

Which of the following statements is correct? The electric field at a point is

Energy stored in a parallel plate capacitor:

If the magnitude of charges on two point objects is doubled and the distance between them is also doubled, then force will be: ...

The number of electrons taken out from a body to produce 1 coulomb of charge will be:

Two point charges attract each other with an electric force of magnitude F. If the charge on one of the particles is reduced to one-half its original value and the distance between the particles is doubled, what is the resulting magnitude of the electric force between them?

What is the acceleration of an object having charge 2μC and mass 2 g moving through electric field strength 20 N/C?

Find the electric field when the velocity of the field is 12m/s and the flux density is 8.75 units.

The force between two charges Q and q, separated by a distance is F. What will be the force between 4Q and q/2?

The presence of dielectric between two charged particles:

A particle carrying a charge 3e, accelerates through a potential difference of 2V. The energy acquired by it is?

A positive point charge q1 creates an electric field of magnitude E₁ at a spot located at a distance r1 from the charge. The charge is replaced by another positive point charge q2, which creates a field of magnitude E₂ = E₁ at a distance of r2 = 2r1. How is q1 related to q2?

Electric intensity at the centre of a uniformly distributed charge is:

Electric potential difference can be defined as:

The negative of potential gradient is equal to:

The coloumb constant is defined as: (E stands for epsilon here)

The SI unit of electric intensity is:

Oil droplets of mass m and charge q are dropped between two horizontal parallel plates. Air resistance is negligible. The droplets are falling at constant velocity when electric field strength between the plates is E. Which of the following is true?

Electrostatic force is:

The minimum indivisible unit of charge is:

Static charge always creates:

What voltage is required to store 7.2 x 105 C of charge on the plates of a 6.0 μF capacitor?

Electric field lines:

The capacitance of a parallel plate capacitor can be written as:

The force between two charges Q and q, separated by a distance is F. What will be the force between them when the distance between them is d/2?

Time constant is defined as the time required by the capacitor:

The electric potential at a point in an electric field can be defined as?

An uncharged conductor has?

The greek word "xeros" and "graphos" means?

Three objects are brought close to each other, two at a time. When objects A and B are brought together, they repel. When objects B and C are brought together, they also repel. Which of the following are true?

Electric potential energy per unit charge is:

If a particle having charge q is accelerated through a potential difference V, then the energy acquired by the particle is:

According to coulomb's law, the electrostatic forces of attraction between electron and nucleus are _ to its square of the radius.

A charge is moving with velocity v, it enters a uniform magnetic field B. The direction of v is perpendicular to B. What is the path of the charge particle inside the magnetic field?

The capacitance of a capacitor is a measure of its ability to:

Three objects are brought close to one another, two at a time. When objects A and B are brought together, they attract. When objects B and C are brought together, they repel. Which of the following are necessarily true?

Many computer keyboard buttons are constructed using capacitors. When a key is pushed down, the soft insulator between the movable plate and the fixed plate is compressed. When the key is pressed, what happens to the capacitance?

The value of permittivity of material, other than air or space is:

A capacitor can store its energy in its:

Ceq =C₁+ C₂ + C₃ + ... + Cn is the combination in _.

Force acting on a positive charge is always:

The value of the Coulomb constant is _.

If the distance between two point charges is halved, the force between them would be _.

A test charge of 23 μC is at a point P where an external electric field is directed to the left and has a magnitude of 3.1 x106 N/C. If the test charge is replaced with another test charge of 13 μC, what happens to the external electric field at P?

The capacitance of the parallel plate capacitor can be written as _.

Farad is defined as?

You have three capacitors, each of 2 µC. In which of the following combinations of the three capacitors, the resultant capacitance is 3µC?

The unit of electric field strength is?

Electric flux on a surface enclosing a charge depends upon:

The capacitance of a spherical capacitor is given by:

The lines of force on charged particles are always:

The unit of electric charge is:

The value of permittivity of free space is:

Capacitance of a parallel plate capacitor depends upon:

In parallel combination of capacitors, voltage is:

Force exerted by a unit charge is called:

The unit of capacitance is:

The property due to which substances attract or repel each other is called:

Electric charge is measured in:

Work done per unit coulomb is:

SI unit of permittivity of free space is:

For an (n) number of capacitors, each with capacitance "C", what will be the ratio between the maximum and minimum capacitances?

A 18.0 V battery is connected to a capacitor, resulting in 27.0 μC of charge stored on the capacitor. How much energy is stored in the capacitor?

The force between two charges Q and q, separated by a distance d is F. What will be the force between them when distance between them is d/2?

Question is given below.

Coulomb's law is true for:

Consider a capacitor has vacuum in the space between the conductors. If we double the amount of charge on each conductor, what happens to the capacitance?

A cable 4 km long and of total resistance 1 Ohm carries electric current from a generator producing 100kW at 10,000 Volts. The current in amperes in the cable is:

When a charge experience a force, there will be a _ field developed.

Which two or more of the following actions would increase the energy stored in a parallel plate capacitor when a constant potential difference is applied across the plates:

Joule/coulomb is a unit of:

Electric potential due to 2uC charge at distance of one meter is equal to:

Coulomb's law is given by the formula:F=kq1 q2 / r2The magnitude of k having the unit of Nm2 C-2 for free space is equal to:

You have three capacitors, each of 2 C. In which of the following combinations of the three capacitors is the resultant capacitance 6 C?

Charged body attracts uncharged body by _ induction.

Electric field lines due to a positive charge are:

Formula for electric field intensity is:

Two unlike charges attract each other with a force of 10 N. If the distance between them is doubled, the force between them is:

Electric field strength of a point charge is E and electric potential is V, at a distance 'r' from the point charge. What is the electric potential at a point for the same point charge where electric field strength is E/4?

Two equal, opposite charges are fixed at a distance d. Positive charge is at the right and negative at the left position. As shown below: X - Y + Z. At which position, the net electric field is directed to the left?

Two charges of -2µC and +4µC are a fixed distance apart. As shown below: A is +4µC and B is -2µC CAt which position can the electric field be zero?

What is the formula for Coulomb's law?

A proton has mass m and charge q. It is suspended in electric and gravitational field. What is the magnitude of electric field?

Which one is the correct statement about selenium?

The greek word "xeros" and "graphos" means:

Three equal, opposite charges are fixed at a distance d. Positive charge is at the right and negative at the left position. As shown below:+ X, - Y, + Z At which position, the net electric field is directed to the left?

A charge is moving with velocity v, it enters a uniform electric field E. The direction of v and E are not parallel. What is the path of the charge particle inside the electric field?

If two point charges of charge q1 and q2 are placed at distance d. The force between them is proportional to:

What is the change in kinetic energy of a proton when it is accelerated through a potential difference of 2MV?

The force between two point charges separated by a certain distance is F. If each charge is doubled and the distance between them is also doubled, then the force would be:

If two point charges of charge q1 and q2 are placed at distance d, then the force between them is proportional to:

Electron Volt is the unit of:

Three times decrease in the distance between the plates of a parallel plate, capacitor will _.

A parallel plate capacitor has a capacitance C. If the distance between the plates is halved, what will the capacitance be?

The charge on neutron is:

Two capacitors C₁ (6uF) and C₂ (12uF) are in series across a 180 volts d.c. supply. Calculate the charges on C₁ and C₂ respectively.

A 2uF capacitor is connected to a 10 V dc supply, if ‘Q’ represents the charge on each plate and ‘E’ the energy stored on each plate, which of the following represents the values of Q and E?

Two positive point charges Q₁ = 16 micro-coulombs and Q₂ = 4 micro-coulombs are separated in a line by a distance of 3 meters. Find the spot on the line between the charges where the electric field is zero.

e/m for an electron is _, when the charge of an electron is 1.6 x 10-19C and mass of electron is 9.1 x 10-31kg.

SI unit of electric field is volt/meter, which is equivalent to:

If we double the separation between two charges, then coulomb's force will become?

When a charge Q on a capacitor is doubled, then energy stored U will be:

Two positive point charges are placed 2m apart. The electric potential at midpoint due to these two charges will be _:

Two point charges of +5 C and -12 C attract each other with a force of 1.48 N. If charge of -5 C is added to each of these charges. Now the force will be:

Charges of +2 μC and -2 μC are situated at points P and Q respectively, as shown below. X is midway between P and Q. Which of the following correctly describes the electric field and the electric potential at point X?

Two capacitors C₁ (6μF) and C₂(12μF) are in series across a 180 volts d.c. supply. Calculate the potential difference across each capacitor (C₁ and C₂).

The total outward flux over any closed hypothetical surface called _ is equal to the total charge enclosed divided by ε irrespective of how the charge is distributed.

A particle carrying charge of 2e falls through a potential difference of 3.0 V. Calculate energy acquired by it.

If the potential difference of 1 volt is applied across the end of a conductor and the current flowing through the conductor is one ampere, then the resistance of the conductor is said to be?

The net charge flowing through any section of the conductor per unit time is known as?

“The magnitude of electrostatic force between two point charges is directly proportional to the product of the magnitude of the charges and inversely proportional to the square of the distance between them.” This is known as:

Ohm multiplied by farad is equivalent to:

In what form is the energy stored in a charged capacitor?

The values of electric intensity will _ due to the presence of dielectric medium:

If the potential at a point which is 1m from a charge is 1 volt, then the potential at a point which is 2m from the same charge will be:

Two capacitors C₁ ( 12 uf ) and C₂ (24 uf) are in series connected across a 360 volts d.c. supply. Calculate the charges on C₁ and C₂ respectively.

If a dielectric material is placed between two plates of a capacitor, the net capacitance of the capacitor:

A 10 nanofarad (10 x 10-9 F) parallel plate capacitor holds a charge of magnitude 50 µC on each plate.If the plates are separated by a distance of 0.885mm, what is the area of each plate?

A sphere of charge +Q is fixed in a position. A smaller sphere of +q is placed near the larger sphere and released from the rest. The small sphere will move away from the large sphere with?

Two capacitors C₁ = 3 uF and C₂ = 6 uF are in series across a 90 volts D.C. supply. The total capacitance is given by:

An electron is situated midway between two parallel plates 0.5 cm apart. One of the plates is maintained at a potential of 60 volts above the other. The force on the electron is: (e = -1.6x10-19C)

What is true about the electric field and electric force?

Two capacitors C₁ = 2μF and C₂ = 4μF, are connected in series across a 100 V supply. Find the effective capacitance:

Which statement describes the electric potential difference between two points in the electric field of charge Q?

The energy stored inside a capacitor is given by the relation:

The energy supplied by the cell to the charge carriers is derived from the conversion of:

B_y increasing the area of the plates and decreasing the distance between them, the capacitance of a capacitor:

The energy stored in the capacitor is written as:

A parallel plate capacitor has a capacitance C. If the distance between the plates halves, the capacitance will be?

When a charged particle is projected perpendicular to a magnetic field:

Electric field strength at a point between oppositely charged plates is 'E'. If the distance between plates is reduced to half, what will be the new value of electric intensity?

The question is given below: