Electric Potential: Interactive Quizzes and Practice Questions

Question 1

Explain the relationship between electric potential and electric field. How do these two concepts influence each other?

Accepted Answer

Electric potential is the negative gradient of electric field strength.

Answer

Electric potential is directly proportional to electric field strength.

Answer

Electric potential is independent of electric field strength.

Question 2

The electric field and the electric potential at a point are related by the equation:

Accepted Answer

E = -∇V

Answer

E = ∇V

Answer

E = V∇

Answer

E = -V∇

Question 3

What is the SI unit of electric potential?

Accepted Answer

Volt (V)

Answer

Joule (J)

Answer

Coulomb (C)

Answer

Farad (F)

Question 4

The electric potential at a point due to a point charge Q is:

Accepted Answer

V = kQ/r

Answer

V = kQr

Answer

V = -kQ/r

Answer

V = -kQr

Question 5

An electron is released from rest in a uniform electric field. Its acceleration is:

Accepted Answer

Proportional to the electric field strength

Answer

Inversely proportional to the electric field strength

Answer

Zero

Answer

Independent of the electric field strength

Question 6

The electric potential energy of a system of charges is:

Accepted Answer

Can be either positive or negative

Answer

Always positive

Answer

Always negative

Answer

Zero

Question 7

Which property is not characteristic of electric potential energy?

Accepted Answer

Dependent on particle mass

Answer

Scalar quantity

Answer

Conservative

Answer

Dependent on particle charge

Question 8

Which of the following factors does NOT affect the electric potential at a point in space?

Accepted Answer

Temperature of the surrounding medium

Answer

Magnitude and sign of nearby charges

Answer

Distance from nearby charges

Answer

Shape of the charges

Question 9

The electric field strength at a point in space is:

Accepted Answer

Negative gradient of electric potential at that point

Answer

Positive gradient of electric potential at that point

Answer

Equal to the electric potential at that point

Answer

Zero at that point

Question 10

A capacitor stores:

Accepted Answer

Electric potential energy

Answer

Electric charge

Answer

Electric field energy

Answer

Magnetic energy

Question 11

The unit of electric potential is called?

Accepted Answer

Volt

Answer

Coulomb

Answer

Farad

Answer

Joule

Question 12

The relation between electric potential and distance from a point charge is:

Accepted Answer

V = kQ / r

Answer

V = kQr

Answer

V = -kQ / r

Answer

V = -kQr

Question 13

The electric potential due to a dipole is

Accepted Answer

Proportional to the dipole moment and inversely proportional to the square of the distance

Answer

Zero

Answer

Proportional to the dipole moment and directly proportional to the distance

Answer

Proportional to the charge and inversely proportional to the distance

Question 14

Equipotential surfaces are surfaces where the:

Accepted Answer

Electric potential is constant

Answer

Electric field is zero

Answer

Electric field is constant

Answer

Electric potential gradient is zero

Question 15

The relation between the electric field and the electric potential is:

Accepted Answer

Electric field is in the direction of the decreasing potential

Answer

Electric field is in the direction of increasing potential

Answer

Electric field is perpendicular to the equipotential surface

Answer

Electric field is zero at that point

Question 16

The electric potential due to a continuous charge distribution is calculated as:

Accepted Answer

V = k * ∫(ρ/r)dV

Answer

V = -k * ∫(ρ/r)dV

Answer

V = k * ∫(r/ρ)dV

Answer

V = -k * ∫(r/ρ)dV

Question 17

Which device measures electric potential?

Accepted Answer

Voltmeter

Answer

Ammeter

Answer

Galvanometer

Answer

Ohmmeter

Question 18

Which of the following is the SI unit of electric potential?

Accepted Answer

Volt

Answer

Ampere

Answer

Joule

Answer

Watt

Question 19

Consider a uniform electric field. The electric potential difference between two points A and B in the field is:

Accepted Answer

Proportional to the distance between A and B

Answer

Inversely proportional to the distance between A and B

Answer

Independent of the distance between A and B

Answer

Depends on the shape of the field

Question 20

Which of the following devices can be used to measure electric potential?

Accepted Answer

Voltmeter

Answer

Ammeter

Answer

Galvanometer

Answer

Capacitance meter

Question 21

The electric potential around a charged conductor is:

Accepted Answer

Constant

Answer

Linear

Answer

Quadratic

Answer

Exponential

Question 22

Which of the following charge distributions produces a uniform electric field?

Accepted Answer

Infinite plane of charge

Answer

Point charge

Answer

Spherical shell of charge

Question 23

What is the potential difference between two points A and B if the electric field along the path from A to B is constant and equal to 200 V/m and the distance between A and B is 5 cm?

Accepted Answer

1 kV

Answer

2 kV

Answer

100 V

Answer

500 V

Question 24

An electron is moving in a region of space where the electric potential is given by V = -kx², where k is a positive constant. What is the direction of the electric field at a point x?

Accepted Answer

-x direction

Answer

+x direction

Answer

+y direction

Answer

-y direction

Question 25

Determine the electric potential due to a dipole consisting of charges +q and -q separated by a distance 2a:

Accepted Answer

(kq/2a) cosθ

Answer

(kq/a) cosθ

Answer

(kq/4a) cosθ

Answer

Zero

Question 26

The potential difference between two points A and B in an electric field is defined as:

Accepted Answer

The work done by the electric field in moving a unit positive charge from A to B

Answer

The negative of the work done by the electric field in moving a unit positive charge from B to A

Answer

The electric field strength at the midpoint of AB

Answer

The potential energy of a unit positive charge at A

Question 27

The SI unit of electric potential is:

Accepted Answer

Volt

Answer

Joule

Answer

Coulomb

Answer

Farad

Question 28

Electric potential at a point is defined as the:

Accepted Answer

Work done in bringing a unit positive charge from infinity to that point

Answer

Force experienced by a unit positive charge at that point

Answer

Electric field at that point

Answer

Charge density at that point

Question 29

Which of the following is a property of equipotential surfaces?

Accepted Answer

They have the same electric potential at all points

Answer

They are always perpendicular to electric field lines

Answer

They are always parallel to electric field lines

Answer

They enclose regions of space with zero electric potential

Question 30

Which SI unit represents electric potential?

Accepted Answer

Joule per coulomb

Answer

Volt per meter

Answer

Coulomb per meter

Answer

Newton per coulomb

Question 31

Which charge configuration generates a uniform electric field?

Accepted Answer

Plane charge

Answer

Point charge

Answer

Line charge

Answer

Spherical charge

Question 32

Which of the following is the formula for electric potential due to a point charge Q?

Accepted Answer

V = kQ/r

Answer

V = kQr

Answer

V = Q/kr

Answer

V = r/kQ

Question 33

Two charges, +q and -q, are placed a distance 'd' apart. What is the electric potential at a point midway between the charges?

Accepted Answer

Zero

Answer

Positive

Answer

Negative

Answer

Dependent on the magnitude of the charges

Question 34

A capacitor is charged to a potential difference of V. How much work is done in moving a charge q from one plate to the other?

Accepted Answer

W = Vq

Answer

W = q/V

Answer

W = V/q

Answer

W = qV^2

Question 35

What is the electric potential inside a charged conducting sphere?

Accepted Answer

Zero

Answer

Proportional to the radius of the sphere

Answer

Proportional to the charge on the sphere

Answer

Dependent on the material of the sphere

Question 36

Which of the following devices relies on the principle of electric potential?

Accepted Answer

Capacitor

Answer

Battery

Answer

Resistor

Answer

Inductor

Question 37

What determines the electric potential energy of a system of charges?

Accepted Answer

Dependent on the arrangement of the charges

Answer

Always positive

Answer

Always negative

Answer

Zero if the charges are all at the same potential

Question 38

What is the approximate formula for electric potential due to a dipole?

Accepted Answer

V = k(p cos θ) / r^2

Answer

V = k(p sin θ) / r^3

Answer

V = k(p cos θ) / r^3

Answer

V = k(p sin θ) / r^2

Question 39

What is the definition of electric potential?

Accepted Answer

The potential energy per unit charge at a given point

Answer

The force experienced by a unit charge

Answer

The energy required to move a charge from one point to another

Answer

The rate of energy transfer in an electric circuit

Question 40

Which of the following actions will increase the electric potential at a given point?

Accepted Answer

Increasing the charge and decreasing the distance

Answer

Decreasing the charge and increasing the distance

Answer

Increasing both the charge and the distance

Answer

Decreasing both the charge and the distance

Question 41

What is the electric potential inside a charged spherical conductor?

Accepted Answer

Zero

Answer

Equal to the potential at the surface of the conductor

Answer

Proportional to the charge on the conductor

Answer

Inversely proportional to the radius of the conductor

Question 42

Two point charges of equal magnitude but opposite signs are placed a distance 'd' apart. What is the electric potential at a point directly between the charges?

Accepted Answer

Zero

Answer

Positive

Answer

Negative

Answer

Cannot be determined

Question 43

What is the potential difference between two points in an electric field?

Accepted Answer

The electric potential at one point minus the electric potential at the other point

Answer

The work done per unit charge in moving a charge

Answer

The electric field at one point minus the electric field at the other point

Answer

The distance between the two points multiplied by the electric field

Question 44

What is the SI unit of electric potential?

Accepted Answer

Volt

Answer

Coulomb

Answer

Farad

Answer

Tesla

Question 45

Which of the following is NOT an advantage of using electric potential energy over electric potential?

Accepted Answer

It is more useful in describing the strength of electric fields

Answer

It takes into account the charge of the object

Answer

It provides a more complete understanding of energy transformations

Answer

It is easier to calculate

Question 46

Which of the following correctly defines electric potential?

Accepted Answer

Energy needed to move a unit charge from infinity to a given point

Answer

Force exerted on a charge per unit charge

Answer

Potential difference between two points in an electric field

Answer

Rate of change of electric field with respect to distance

Question 47

In a region where the electric field is uniform, what can be said about the electric potential in that region?

Accepted Answer

It is constant

Answer

It varies linearly with the distance

Answer

It varies inversely with the distance

Answer

It varies quadratically with the distance

Question 48

A spherical conductor of radius R carries a charge Q. What is the electric potential at the center of the conductor?

Accepted Answer

0

Answer

Q/(4ππε₀R)

Answer

Q/(2ππε₀R)

Answer

Q/(πε₀R)

Question 49

A capacitor is connected to a battery and then disconnected. What is stored in the capacitor?

Accepted Answer

Both electric potential energy and electric field energy

Answer

Electric potential energy

Answer

Electric field energy

Answer

Neither electric potential energy nor electric field energy

Question 50

The electric potential at a point in an electric field is:

Accepted Answer

The work done per unit charge in moving a test charge from infinity to that point

Answer

The force per unit charge experienced by a test charge placed at that point

Answer

The change in potential energy per unit charge of a charge placed at that point

Answer

The electric field strength at that point

Question 51

The electric potential inside a charged spherical shell is:

Accepted Answer

Zero

Answer

Proportional to the distance from the center

Answer

Proportional to the square of the distance from the center

Answer

Equal to the potential on the surface of the shell

Question 52

A capacitor with capacitance C is charged to a potential difference V. The energy stored in the capacitor is:

Accepted Answer

1/2 CV^2

Answer

CV

Answer

CV^2

Answer

1/2 CV

Question 53

Define electric potential at a point in an electric field.

Accepted Answer

The work done per unit charge in moving a test charge from infinity to that point

Answer

The electric force per unit charge at that point

Answer

The electric field strength at that point

Answer

The charge per unit area at that point

Question 54

Which charge distribution produces a uniform electric field?

Accepted Answer

A line charge of infinite length

Answer

A point charge

Answer

A spherical charge distribution

Answer

A dipole

Question 55

Describe the shape of equipotential surfaces around a point charge.

Accepted Answer

Concentric spheres

Answer

Concentric cylinders

Answer

Planes parallel to each other

Answer

Hyperboloids

Question 56

Define electric potential gradient at a point.

Accepted Answer

The rate of change of electric potential with respect to distance

Answer

The rate of change of electric field strength with respect to distance

Answer

The rate of change of electric energy with respect to distance

Answer

The rate of change of electric charge with respect to distance

Question 57

Approximate the electric potential of the Earth's surface.

Accepted Answer

0 V

Answer

100 V

Answer

1000 V

Answer

10000 V

Question 58

What is the relationship between electric potential and electric field?

Accepted Answer

Electric potential gradient is equal to the electric field strength.

Answer

Electric potential is proportional to the electric field strength.

Answer

Electric potential is inversely proportional to the electric field strength.

Answer

Electric potential is independent of the electric field strength.

Question 59

Consider two point charges, +q and -q, separated by a distance 'd'. What is the electric potential at a point equidistant from both charges?

Accepted Answer

Zero

Answer

+q/4πε₀d

Answer

-q/4πε₀d

Answer

q/4πε₀d

Question 60

A charged conducting sphere of radius 'R' has a charge 'Q'. What is the electric potential at the centre of the sphere?

Accepted Answer

Zero

Answer

Q/4πε₀R

Answer

Q/2πε₀R

Answer

Q/πε₀R

Question 61

What is the change in electric potential energy when a charge 'q' is moved from point A to point B in an electric field?

Accepted Answer

ΔU = q(Vₐ - V゙)

Answer

ΔU = V゙ - Vₐ

Answer

ΔU = q(Vₐ + V゙)

Answer

ΔU = VₐV゙

Question 62

What is a characteristic of an equipotential surface?

Accepted Answer

Constant electric potential

Answer

Constant electric field

Answer

Zero electric field

Answer

Zero electric potential

Question 63

Which factor does NOT affect the electric potential at a point in space?

Accepted Answer

Material between the charge and the point

Answer

Magnitude of the charge distribution

Answer

Distance from the charge distribution

Answer

Shape of the charge distribution

Question 64

In a uniform electric field, the equipotential surfaces are:

Accepted Answer

Planes perpendicular to the field lines

Answer

Spheres centred at the source charge

Answer

Cylinders parallel to the field lines

Answer

Irregular surfaces depending on the shape of the field