Electric Fields: Interactive Learning Quizzes for Physics BSc

Question 1

An electric field exists around a point charge because of its:

Accepted Answer

Presence of electric charge

Answer

Presence of potential difference

Answer

Motion of electric charges

Answer

Flow of current

Question 2

The electric potential at a point is defined as the:

Accepted Answer

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

Answer

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

Answer

Potential difference between that point and infinity

Answer

Electric field at that point

Question 3

Gauss's law states that:

Accepted Answer

The net electric flux through a closed surface is proportional to the enclosed charge

Answer

The electric field inside a conductor is always zero

Answer

The potential energy of a system of charges is minimized when the charges are separated as far apart as possible

Answer

The force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them

Question 4

The electric field due to a uniformly charged infinite sheet is:

Accepted Answer

Constant and perpendicular to the sheet

Answer

Insignificant

Answer

Proportional to the square of the distance from the sheet

Answer

Proportional to the inverse square of the distance from the sheet

Question 5

The electric field inside a charged spherical shell is:

Accepted Answer

Zero

Answer

Constant and radial

Answer

Proportional to the distance from the center of the shell

Answer

Proportional to the inverse square of the distance from the center of the shell

Question 6

Which fundamental property distinguishes electric charges?

Accepted Answer

Electric charge

Answer

Mass

Answer

Volume

Answer

Temperature

Question 7

The electric potential at a specific location in space is defined as the:

Accepted Answer

Work required per unit charge to move a test charge from infinity to that point

Answer

Force experienced by a unit charge placed at that point

Answer

Electric field intensity at that point

Answer

Charge density at that point

Question 8

Gauss's law establishes a relationship between:

Accepted Answer

Electric field and enclosed charge

Answer

Magnetic field and enclosed current

Answer

Gravitational field and enclosed mass

Answer

Temperature and enclosed volume

Question 9

In a region with a uniform electric field E, the electric potential difference between two points separated by a distance d along the field's direction is:

Accepted Answer

Ed

Answer

0

Answer

E/d

Answer

-Ed

Question 10

The electric field lines around a point charge Q are:

Accepted Answer

Radial and directed outward

Answer

Radial and directed inward

Answer

Circular and clockwise

Answer

Circular and counterclockwise

Question 11

Which of the following materials is a good conductor of electricity?

Accepted Answer

Copper

Answer

Wood

Answer

Rubber

Answer

Glass

Question 12

Which of the following is NOT a characteristic of electric fields?

Accepted Answer

Scalar quantity

Answer

Vector quantity

Answer

Conservative quantity

Answer

Superposition principle applies

Question 13

The electric potential at a point is defined as:

Accepted Answer

The work done against the field in moving a positive unit charge from infinity to that point

Answer

The work done by the field in moving a negative unit charge from infinity to that point

Answer

The force experienced by a unit positive charge at that point

Answer

The potential energy of a unit positive charge at that point

Question 14

Gauss's law states that:

Accepted Answer

The net electric flux through any closed surface is proportional to the net charge enclosed within that surface

Answer

The electric field lines always begin and end on charges

Answer

The potential energy of a charge in an electric field is proportional to the distance between the charge and a reference point

Answer

The force on a charge in an electric field is proportional to the square of the strength of the field

Question 15

A point charge +Q is placed at the origin. What is the electric field at a distance r from the charge?

Accepted Answer

+Q/r^2

Answer

-Q/r^2

Answer

+Q*r^2

Answer

-Q*r^2

Question 16

A dielectric material is inserted between the plates of a capacitor. What happens to the capacitance of the capacitor?

Accepted Answer

It increases

Answer

It decreases

Answer

It remains the same

Answer

It becomes unpredictable

Question 17

Which of the following is a unit of electric field strength?

Accepted Answer

Newton per Coulomb

Answer

Volt

Answer

Coulomb

Answer

Farad

Question 18

A charged particle is moving in a uniform electric field. What is the trajectory of the particle?

Accepted Answer

Straight line

Answer

Parabola

Answer

Circle

Answer

Ellipse

Question 19

An electric field is the region of space around a charged particle where other charged particles experience an electric force. What is the direction of the electric field due to a positive charge?

Accepted Answer

Radially outward

Answer

Radially inward

Answer

Tangentially clockwise

Answer

Tangentially counterclockwise

Question 20

Electric potential at a point is defined as the electrical potential energy per unit charge of a positive test charge brought from infinity to that point. What is the SI unit of electric potential?

Accepted Answer

Volt

Answer

Coulomb

Answer

Farad

Answer

Tesla

Question 21

Gauss's law states that the net electric flux through any closed surface is proportional to the charge enclosed by the surface. What is the proportionality constant in Gauss's law?

Accepted Answer

Permittivity of free space, ε₀

Answer

Planck's constant, h

Answer

Faraday's constant, F

Answer

Coulomb's constant, k

Question 22

Dielectric materials are non-conducting materials that can store electric energy when placed in an electric field. What property of a dielectric material determines its ability to store electric energy?

Accepted Answer

Permittivity

Answer

Susceptibility

Answer

Resistance

Answer

Conductivity

Question 23

Electric current is the flow of electric charge. What is the SI unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Coulomb

Question 24

Ohm's law describes the relationship between voltage, current, and resistance in an electric circuit. Which of the following is Ohm's law?

Accepted Answer

Voltage = Current × Resistance

Answer

Resistance = Voltage / Current

Answer

Current = Resistance / Voltage

Answer

Current = Voltage + Resistance

Question 25

A battery is a device that converts chemical energy into electrical energy. What is the electromotive force (EMF) of a battery?

Accepted Answer

The potential difference between its terminals when no current is flowing

Answer

The current flowing through it when its terminals are connected

Answer

The resistance of its internal circuit

Answer

The power output of the battery

Question 26

A capacitor is a device that stores electrical energy. What is the energy (E) stored in a capacitor?

Accepted Answer

1/2 * C * V²

Answer

1/2 * V² / C

Answer

C * V

Answer

V² * C