Electricity and Magnetism Learning Quizzes | Comprehensive Science for 12th Grade

Question 1

What is the defining characteristic of an electric circuit?

Accepted Answer

A closed loop that allows electric current to flow

Answer

Multiple open loops

Answer

Current flow only in the presence of a magnetic field

Answer

Resistance is directly proportional to current

Question 2

Which unit measures electric charge?

Accepted Answer

Coulomb

Answer

Ampere

Answer

Ohm

Answer

Volt

Question 3

An electric field exists where:

Accepted Answer

Electric charges are present

Answer

Magnetic forces are present

Answer

Gravitational forces are present

Answer

Light waves are present

Question 4

The magnetic field surrounding a current-carrying wire has a shape that is:

Accepted Answer

Circular

Answer

Straight

Answer

Elliptical

Answer

Parabolic

Question 5

The potential difference between two points in an electric field is also known as:

Accepted Answer

The work done per unit charge

Answer

The electric field strength

Answer

The magnetic flux density

Answer

The current density

Question 6

Which unit measures magnetic flux?

Accepted Answer

Weber

Answer

Tesla

Answer

Ampere

Answer

Coulomb

Question 7

The force between two magnetic poles:

Accepted Answer

Is inversely proportional to the square of their distance apart

Answer

Increases as the distance between them increases

Answer

Decreases as the distance between them increases

Answer

Is directly proportional to the square of their distance apart

Question 8

The phenomenon of electromagnetic induction is explained by:

Accepted Answer

Faraday's law

Answer

Ohm's law

Answer

Gauss's theorem

Answer

Ampere's law

Question 9

The electric field strength around a point charge Q is given by:

Accepted Answer

E = kQ/r^2

Answer

E = kQ/r

Answer

E = Q/kr

Answer

E = kQr^2

Question 10

In a series circuit, the total resistance is:

Accepted Answer

Equal to the sum of the individual resistances

Answer

Less than the sum of the individual resistances

Answer

Greater than the sum of the individual resistances

Answer

Dependent on the current flowing through the circuit

Question 11

An electric motor primarily converts:

Accepted Answer

Electrical energy to mechanical energy

Answer

Mechanical energy to electrical energy

Answer

Heat energy to electrical energy

Answer

Electrical energy to light energy

Question 12

Which of the following materials is ferromagnetic?

Accepted Answer

Iron

Answer

Copper

Answer

Aluminum

Answer

Plastic

Question 13

A transformer is primarily used to:

Accepted Answer

Change voltage levels

Answer

Change current levels

Answer

Convert AC to DC

Answer

Convert DC to AC

Question 14

The SI unit of magnetic flux is the:

Accepted Answer

Weber

Answer

Tesla

Answer

Henry

Answer

Ampere

Question 15

What is the SI unit of electric potential?

Accepted Answer

Volt

Answer

Ampere

Answer

Ohm

Answer

Farad

Question 16

What does a capacitor store?

Accepted Answer

Electrical energy

Answer

Magnetic energy

Answer

Thermal energy

Answer

Kinetic energy

Question 17

How do you determine the direction of the magnetic field around a current-carrying wire?

Accepted Answer

Right-hand rule

Answer

Left-hand rule

Answer

Maxwell's equations

Answer

Gauss's law

Question 18

What phenomenon is responsible for generating electric current in a conductor?

Accepted Answer

Electromagnetic induction

Answer

Production of magnetic fields

Answer

Microwaves

Answer

Radio waves

Question 19

In a series circuit, the total resistance is:

Accepted Answer

Equal to the sum of the individual resistances

Answer

Less than the sum of the individual resistances

Answer

Greater than the sum of the individual resistances

Answer

Dependent on the voltage applied

Question 20

In a parallel plate capacitor, which factor will increase its capacitance?

Accepted Answer

Increasing the permittivity of the material between the plates

Answer

Increasing the distance between the plates

Answer

Decreasing the area of the plates

Answer

Increasing the voltage across the capacitor

Question 21

Which of the following materials is NOT a conductor of electricity?

Accepted Answer

Plastic

Answer

Copper

Answer

Silver

Answer

Aluminum

Question 22

Which factor does NOT affect the resistance of a wire?

Accepted Answer

Voltage

Answer

Length

Answer

Temperature

Answer

Cross-sectional area

Question 23

Which property distinguishes an electromagnet from a permanent magnet?

Accepted Answer

No magnetic field when current is absent

Answer

Strong magnetic field

Answer

Attracts only certain materials

Answer

Permanent magnetization

Question 24

Which of the following is NOT an application of electromagnetic induction?

Accepted Answer

Capacitors

Answer

Electric motors

Answer

Transformers

Answer

Generators

Question 25

What is the primary function of a capacitor in an AC circuit?

Accepted Answer

To store energy

Answer

To block DC currents

Answer

To allow only high-frequency currents

Answer

To increase voltage

Question 26

According to Lenz's law, the direction of an induced current:

Accepted Answer

Opposes the change in magnetic flux

Answer

Reinforces the change in magnetic flux

Answer

Is always clockwise

Answer

Is always counterclockwise

Question 27

Energy is stored in an electrical capacitor in the form of a(n):

Accepted Answer

Electrical field

Answer

Magnetic field

Answer

Chemical field

Answer

Mechanical field

Question 28

Among the following materials, which one is known to be a superior conductor of electricity?

Accepted Answer

Copper

Answer

Glass

Answer

Rubber

Answer

Plastic

Question 29

An open circuit is characterized by the:

Accepted Answer

Absence of a complete path for current flow

Answer

Presence of a complete path for current flow

Answer

High resistance to current flow

Answer

Low resistance to current flow

Question 30

The magnetic field pattern produced around a current-carrying wire is:

Accepted Answer

Circular

Answer

Linear

Answer

Elliptical

Answer

Irregular

Question 31

Which of the following is NOT an example of an application of electromagnetism?

Accepted Answer

Internal combustion engines

Answer

Electric motors

Answer

Radio waves

Answer

MRI scanners

Question 32

The phenomenon of electromagnetic induction is described by:

Accepted Answer

Faraday's law

Answer

Ohm's law

Answer

Coulomb's law

Answer

Gauss's law

Question 33

The force experienced between two charged particles is referred to as:

Accepted Answer

Electrical force

Answer

Gravitational force

Answer

Magnetic force

Answer

Nuclear force

Question 34

The unit used to measure electric current is:

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Coulomb

Question 35

Identify the component that is not essential for a basic electric circuit:

Accepted Answer

Magnet

Answer

Battery

Answer

Wire

Answer

Switch

Question 36

To determine the direction of the magnetic field around a current-carrying wire, you can employ:

Accepted Answer

Right-hand rule

Answer

Maxwell's equations

Answer

Gauss's theorem

Answer

Lenz's law

Question 37

Which material exhibits magnetic properties?

Accepted Answer

Iron

Answer

Gold

Answer

Aluminum

Answer

Wood

Question 38

An electric generator primarily transforms:

Accepted Answer

Mechanical energy into electrical energy

Answer

Electrical energy into mechanical energy

Answer

Chemical energy into electrical energy

Answer

Magnetic energy into electrical energy

Question 39

The force between two magnets can exhibit the following behavior:

Accepted Answer

Attractive or repulsive

Answer

Always attractive

Answer

Always repulsive

Answer

Zero

Question 40

Which of the following actions is not considered a safety precaution when working with electricity?

Accepted Answer

Assuming all wires are live

Answer

Utilizing insulated tools

Answer

Checking for live wires

Answer

Wearing rubber gloves

Question 41

The property of a material that measures its opposition to the flow of electric current is:

Accepted Answer

Resistance

Answer

Conductivity

Answer

Capacitance

Answer

Inductance

Question 42

Which of the following best describes a fundamental property of electric charge?

Accepted Answer

It exerts a force on other charges

Answer

It can be created or destroyed

Answer

It is always associated with a mass

Answer

It is always positive

Question 43

An electric field is best defined as the region around a charged particle where:

Accepted Answer

Electric forces can be detected

Answer

Magnetic forces are strongest

Answer

Electric potential is highest

Answer

Electrons are most concentrated

Question 44

In a basic electric circuit, the electric current (I) is directly proportional to:

Accepted Answer

Voltage (V) and inversely proportional to Resistance (R)

Answer

Voltage (V) and directly proportional to Resistance (R)

Answer

Resistance (R) and inversely proportional to Voltage (V)

Question 45

Which of the following is NOT a characteristic of magnetic materials?

Accepted Answer

They cannot be demagnetized

Answer

They can create magnetic fields

Answer

They can attract or repel other magnets

Answer

They can be permanent or temporary

Question 46

The magnetic force between two parallel current-carrying wires is:

Accepted Answer

Directly proportional to the product of their currents

Answer

Directly proportional to the distance between them

Answer

Inversely proportional to the product of their currents

Question 47

Which device primarily converts electrical energy into mechanical energy?

Accepted Answer

Electric motor

Answer

Transformer

Answer

Capacitor

Answer

Battery

Question 48

The SI unit of electric charge is the:

Accepted Answer

Coulomb

Answer

Tesla

Answer

Volt

Answer

Ampere

Question 49

In a capacitor, electrical energy is primarily stored in the form of:

Accepted Answer

An electric field

Answer

A magnetic field

Answer

Chemical potential

Answer

Kinetic energy

Question 50

Which of the following factors primarily affects the strength of an electromagnetic field?

Accepted Answer

Current, number of turns in the coil, and core material

Answer

Shape of the coil

Answer

Temperature and humidity

Question 51

The phenomenon where a changing magnetic field induces an electric current is known as:

Accepted Answer

Electromagnetic induction

Answer

Magnetic resonance

Answer

Electrostatic discharge

Answer

Superconductivity