Electricity and Magnetism: Interactive Quizzes for 7th Grade Science

Question 1

Which object is an excellent conductor of electricity?

Accepted Answer

Copper

Answer

Rubber

Answer

Plastic

Answer

Wood

Question 2

What is the unit used to measure electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 3

Which material exhibits magnetic properties?

Accepted Answer

Iron

Answer

Aluminum

Answer

Gold

Answer

Silver

Question 4

What is the primary function of an electromagnet?

Accepted Answer

Attracting magnetic objects

Answer

Generating electricity from magnetism

Answer

Producing light

Answer

Storing electrical energy

Question 5

Which of these represents a closed electrical circuit?

Accepted Answer

A wire with its ends connected to a battery

Answer

A wire with one end connected to a battery

Answer

Two wires connected to each other

Answer

A wire with no connections

Question 6

What effect does increasing the strength of a magnet have?

Accepted Answer

Strengthens its magnetic field

Answer

Weakens its magnetic field

Answer

Reduces its size

Answer

Reverses its polarity

Question 7

What is the primary purpose of a transformer in an electrical system?

Accepted Answer

Increasing or decreasing voltage

Answer

Storing electricity

Answer

Converting AC to DC

Answer

Preventing electrical shocks

Question 8

Which material allows electricity to flow easily through it?

Accepted Answer

Copper

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 9

What is the unit of measurement for the flow of electricity?

Accepted Answer

Ampere

Answer

Ohm

Answer

Volt

Answer

Coulomb

Question 10

What happens when a magnet is moved near a wire coil?

Accepted Answer

Electricity flows in the wire

Answer

Nothing

Answer

The wire heats up

Answer

The magnet loses its strength

Question 11

What is the main purpose of a resistor in a circuit?

Accepted Answer

Reduce the current

Answer

Increase the current

Answer

Store energy

Answer

Generate heat

Question 12

Which of these is NOT a safety precaution when working with electricity?

Accepted Answer

Work on a wet surface

Answer

Wear gloves

Answer

Use insulated tools

Answer

Unplug appliances before repairing them

Question 13

What is the difference between a generator and an electric motor?

Accepted Answer

A generator produces electricity, while a motor uses it

Answer

A motor produces electricity, while a generator uses it

Answer

They both produce electricity

Answer

They both use electricity

Question 14

What shape is the magnetic field around a wire carrying electricity?

Accepted Answer

Circular

Answer

Elliptical

Answer

Rectangular

Answer

Triangular

Question 15

Which of these materials allows electricity to flow through it easily?

Accepted Answer

Copper

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 16

What is the unit used to measure electric current?

Accepted Answer

Ampere

Answer

Voltage

Answer

Resistance

Answer

Ohm

Question 17

What causes electricity to flow in a circuit?

Accepted Answer

Voltage

Answer

Resistance

Answer

Magnetic field

Answer

Gravity

Question 18

What is the purpose of a fuse in an electrical circuit?

Accepted Answer

To protect the circuit from too much electricity

Answer

To regulate the flow of electricity

Answer

To act as a switch

Answer

To store electrical energy

Question 19

Which of these is an example of an electromagnet?

Accepted Answer

A coil of wire with electricity flowing through it

Answer

A refrigerator magnet

Answer

A compass needle

Answer

A bar magnet

Question 20

What occurs when a magnet is brought close to a coil of wire?

Accepted Answer

An electric current is induced in the wire.

Answer

The magnet attracts the wire.

Answer

The wire repels the magnet.

Answer

Nothing happens.

Question 21

Which material conducts electricity effectively?

Accepted Answer

Copper

Answer

Rubber

Answer

Wood

Answer

Plastic

Question 22

What is the primary function of a fuse in an electrical circuit?

Accepted Answer

To prevent damage from excessive current.

Answer

To increase the flow of current.

Answer

To control the direction of current flow.

Answer

To store electrical energy.

Question 23

Which of the following is NOT a characteristic of a magnet?

Accepted Answer

Can be shattered into smaller magnets

Answer

Has two poles

Answer

Attracts magnetic materials

Answer

Can be created by passing an electric current through a coil of wire

Question 24

What is the unit of electric current in the International System of Units (SI)?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Coulomb

Question 25

Which unit is used to measure electrical current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 26

When a current-carrying wire is placed near a magnet, what happens?

Accepted Answer

The wire moves perpendicular to both the current and the magnetic field.

Answer

The wire is attracted to the magnet.

Answer

The wire is repelled by the magnet.

Answer

Nothing happens.

Question 27

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

Accepted Answer

Rubber

Answer

Copper

Answer

Silver

Answer

Iron

Question 28

What is the main function of a fuse in an electrical circuit?

Accepted Answer

To break the circuit and prevent damage if the current becomes too high.

Answer

To store electrical energy.

Answer

To regulate the voltage in the circuit.

Answer

To increase the current in the circuit.

Question 29

According to Ohm's Law, what is the relationship between voltage, current, and resistance?

Accepted Answer

Current = Voltage / Resistance

Answer

Voltage = Current x Resistance

Answer

Resistance = Voltage x Current

Answer

Voltage = Current / Resistance

Question 30

What causes the magnetic field around a current-carrying wire?

Accepted Answer

The flow of electrons through the wire.

Answer

The presence of a permanent magnet nearby.

Answer

The rotation of the Earth.

Answer

The gravitational force between the electrons.

Question 31

Which of these materials does NOT allow electricity to flow through it?

Accepted Answer

Plastic

Answer

Copper

Answer

Silver

Question 32

Which of the following materials allows electricity to pass through it?

Accepted Answer

Copper

Answer

Wood

Answer

Rubber

Answer

Paper

Question 33

What unit is used to measure the flow of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Farad

Question 34

What happens when a charged particle moves through a magnetic field?

Accepted Answer

The charge deflects

Answer

The field strengthens

Answer

The charge accelerates

Answer

Nothing happens

Question 35

When working with electricity, why is it essential to use insulated tools?

Accepted Answer

Insulated tools prevent electrical shocks.

Answer

Insulated tools make work more efficient.

Answer

Insulated tools are more durable.

Answer

Insulated tools are less expensive.

Question 36

Which material allows electricity to flow through it easily?

Accepted Answer

Copper

Answer

Plastic

Answer

Wood

Question 37

What is the unit of measurement for the flow of electric charge?

Accepted Answer

Ampere

Answer

Ohm

Answer

Volt

Question 38

Which of the following objects is attracted to a magnet?

Accepted Answer

Iron

Answer

Copper

Answer

Plastic

Answer

Aluminum

Question 39

What is the name of the space around a magnet where its magnetic force is strongest?

Accepted Answer

Magnetic field

Answer

Force field

Answer

Electric field

Answer

Gravitational field

Question 40

Which of the following devices uses the principles of electromagnetism?

Accepted Answer

Electric motor

Answer

Battery

Answer

Resistor

Answer

Switch

Question 41

What is the key difference between AC (alternating current) and DC (direct current)?

Accepted Answer

AC current changes direction regularly, while DC current flows in only one direction

Answer

DC current is found in batteries, while AC current is found in household outlets

Answer

AC current has a higher voltage than DC current

Question 42

What is the primary function of a transformer?

Accepted Answer

To alter the voltage of an alternating current

Answer

To control the flow of current

Answer

To store electrical energy

Answer

To convert AC current to DC current

Question 43

Which of the following is a characteristic of a conductor?

Accepted Answer

Allows the flow of electricity

Answer

Produces electricity

Answer

Stores electrical energy

Answer

Blocks the flow of electricity

Question 44

What is the SI unit used to measure electric current?

Accepted Answer

Ampere (A)

Answer

Watt (W)

Answer

Ohm (Ω)

Answer

Volt (V)

Question 45

Which of these materials serves as a good electrical insulator?

Accepted Answer

Plastic

Answer

Copper

Answer

Silver

Answer

Aluminum

Question 46

What type of force acts between electrically charged objects?

Accepted Answer

Electromagnetic force

Answer

Nuclear force

Answer

Gravitational force

Answer

Frictional force

Question 47

Which of the following is a magnetic material?

Accepted Answer

Iron

Answer

Wood

Answer

Paper

Answer

Gold

Question 48

What shape does the magnetic field around a current-carrying wire form?

Accepted Answer

Circular

Answer

Spiral

Answer

Elliptical

Answer

Straight line

Question 49

Which principle underlies the operation of an electric motor?

Accepted Answer

Electromagnetism

Answer

Electrostatics

Answer

Induction

Answer

Capacitance

Question 50

What device is used to convert mechanical energy into electrical energy?

Accepted Answer

Generator

Answer

Battery

Answer

Capacitor