# Electricity and Magnetism MCQs with Answers

Electricity and Magnetism MCQs are very important test and often asked by various testing services and competitive exams around the world. Here you will find all the Important Electricity and Magnetism MCQs for Preparation.

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## Electricity and Magnetism Online MCQs with Answers

Which of the following materials is a good conductor of electricity?
a) Rubber
b) Wood
c) Copper
d) Glass

c) Copper

Electric current is measured in:
a) Volts
b) Ohms
c) Watts
d) Amperes

d) Amperes

The unit of electric charge is:
a) Volt
b) Ampere
c) Ohm
d) Coulomb

d) Coulomb

Which of the following devices is used to measure electric current?
a) Ammeter
b) Voltmeter
c) Ohmmeter
d) Galvanometer

a) Ammeter

What is the SI unit of electric potential difference?
a) Ampere
b) Volt
c) Ohm
d) Watt

b) Volt

Which of the following statements is true about electric circuits?
a) Electric current flows from positive to negative terminals.
b) Electric current flows from negative to positive terminals.
c) Electric current flows in both directions simultaneously.
d) Electric current does not flow in a closed circuit.

b) Electric current flows from negative to positive terminals.

The property of a material that opposes the flow of electric current is called:
a) Conductance
b) Resistance
c) Capacitance
d) Inductance

b) Resistance

What is the relationship between current, voltage, and resistance in an electric circuit?
a) Ohm’s Law: V = IR
b) Faraday’s Law: E = mc²
c) Boyle’s Law: PV = constant
d) Newton’s Law: F = ma

a) Ohm’s Law: V = IR

Which of the following is an example of a parallel circuit?
a) A single light bulb connected to a battery.
b) Several light bulbs connected in a series.
c) A combination of series and parallel connections.
d) A closed circuit with no components.

c) A combination of series and parallel connections.

The phenomenon of a sudden, brief flow of electric current between two conductors is called:
a) Voltage drop
b) Electric shock
c) Electric discharge
d) Electromagnetic induction

c) Electric discharge

The magnetic field produced by a straight current-carrying wire is:
a) Circular
b) Spherical
c) Cylindrical
d) Linear

a) Circular

What happens to the strength of the magnetic field around a current-carrying wire when the current is increased?
a) The magnetic field strength decreases.
b) The magnetic field strength remains constant.
c) The magnetic field strength increases.
d) The magnetic field strength becomes zero.

c) The magnetic field strength increases.

The SI unit of magnetic field strength is:
a) Tesla
b) Ampere
c) Coulomb
d) Ohm

a) Tesla

Which of the following devices is used to measure magnetic field strength?
a) Ammeter
b) Voltmeter
c) Ohmmeter
d) Magnetometer

d) Magnetometer

The phenomenon of generating an electric current in a wire by changing the magnetic field around it is called:
a) Magnetic induction
b) Electric conduction
c) Magnetic deflection
d) Electric discharge

a) Magnetic induction

The device that converts mechanical energy into electrical energy is called:
a) Battery
b) Generator
c) Transformer
d) Capacitor

b) Generator

The direction of the magnetic field lines around a straight current-carrying wire can be determined using:
a) Right-hand rule
b) Left-hand rule
c) Thumb rule
d) Index finger rule

a) Right-hand rule

Which of the following materials is most commonly used as a core in electromagnets?
a) Copper
b) Aluminum
c) Steel
d) Silver

c) Steel

An electric motor converts:
a) Electrical energy into mechanical energy
b) Mechanical energy into electrical energy
c) Magnetic energy into electrical energy
d) Electrical energy into magnetic energy

a) Electrical energy into mechanical energy

Which of the following statements is true about the polarity of magnets?
a) Like poles attract each other, and unlike poles repel each other.
b) Like poles repel each other, and unlike poles attract each other.
c) Like poles attract each other, and unlike poles neither attract nor repel.
d) Like poles repel each other, and unlike poles neither attract nor repel.

b) Like poles repel each other, and unlike poles attract each other.

The magnetic field of a bar magnet is strongest at:
a) The north pole
b) The south pole
c) The center of the magnet
d) The ends of the magnet

d) The ends of the magnet

Which of the following materials is most commonly used as a permanent magnet?
a) Aluminum
b) Copper
c) Iron
d) Plastic

c) Iron

What is the relationship between the direction of the electric current in a wire and the direction of the magnetic field it produces?
a) They are parallel to each other.
b) They are perpendicular to each other.
c) They are at a 45-degree angle to each other.
d) There is no relationship between them.

b) They are perpendicular to each other.

The SI unit of electric power is:
a) Joule
b) Watt
c) Ampere
d) Ohm

b) Watt

Which of the following devices is used to step up or step down the voltage in an electrical circuit?
a) Battery
b) Resistor
c) Transformer
d) Capacitor

c) Transformer

What happens to the voltage in a series circuit when more resistors are added?
a) The voltage increases.
b) The voltage decreases.
c) The voltage remains the same.
d) The voltage becomes zero.

b) The voltage decreases.

Which of the following devices is used to store electrical charge?
a) Resistor
b) Capacitor
c) Diode
d) Transistor

b) Capacitor

The phenomenon of producing a voltage in a conductor by changing the magnetic field around it is called:
a) Electric induction
b) Magnetic induction
d) Magnetic deflection

b) Magnetic induction

The process of transferring electric energy from one place to another without the flow of actual electrons is called:
a) Electric current
b) Electric discharge
c) Electric transmission
d) Electric conduction

c) Electric transmission

Which of the following materials is a good insulator of electricity?
a) Copper
b) Aluminum
c) Plastic
d) Silver

c) Plastic

The direction of the magnetic field lines around a current-carrying loop of wire can be determined using:
a) Right-hand rule
b) Left-hand rule
c) Thumb rule
d) Index finger rule

a) Right-hand rule

Which of the following devices is used to protect electrical circuits from excessive current?
a) Resistor
b) Capacitor
c) Fuse
d) Transistor

c) Fuse

The force exerted on a current-carrying wire placed in a magnetic field is known as:
a) Electric force
b) Magnetic force
c) Electromagnetic force
d) Gravitational force

b) Magnetic force

The phenomenon of generating an electric current in a coil of wire by changing the magnetic field around it is the principle behind:
a) Electric motors
b) Electric generators
c) Transformers
d) All of the above

d) All of the above

Which of the following statements is true about the magnetic field inside a solenoid?
a) The magnetic field is strongest at the ends of the solenoid.
b) The magnetic field is weakest at the ends of the solenoid.
c) The magnetic field is uniform throughout the solenoid.
d) The magnetic field depends on the direction of current flow.

c) The magnetic field is uniform throughout the solenoid.

The device that converts electrical energy into mechanical energy is called:
a) Battery
b) Generator
c) Transformer
d) Motor

d) Motor

Which of the following statements is true about the magnetic field inside a bar magnet?
a) The magnetic field is strongest at the center of the magnet.
b) The magnetic field is strongest at the ends of the magnet.
c) The magnetic field is weakest at the center of the magnet.
d) The magnetic field is uniform throughout the magnet.

b) The magnetic field is strongest at the ends of the magnet.

Which of the following materials is most commonly used as an insulator in electrical wires?
a) Copper
b) Aluminum
c) Rubber
d) Silver

c) Rubber

The strength of an electric field is determined by:
a) The amount of electric charge
b) The distance from the charge
c) The size of the charge
d) All of the above

d) All of the above

Which of the following devices is used to convert alternating current (AC) to direct current (DC)?
a) Transformer
b) Rectifier
c) Capacitor
d) Inductor

b) Rectifier

The phenomenon of a sudden, brief flow of electric current between two conductors is called:
a) Voltage drop
b) Electric shock
c) Electric discharge
d) Electromagnetic induction

c) Electric discharge

The property of a material that opposes the flow of electric current is called:
a) Conductance
b) Resistance
c) Capacitance
d) Inductance

b) Resistance

The SI unit of electric power is:
a) Joule
b) Watt
c) Ampere
d) Ohm

b) Watt

The device that converts mechanical energy into electrical energy is called:
a) Battery
b) Generator
c) Transformer
d) Capacitor

b) Generator

Which of the following materials is most commonly used as a core in electromagnets?
a) Copper
b) Aluminum
c) Steel
d) Silver

c) Steel

What is the relationship between the direction of the electric current in a wire and the direction of the magnetic field it produces?
a) They are parallel to each other.
b) They are perpendicular to each other.
c) They are at a 45-degree angle to each other.
d) There is no relationship between them.

b) They are perpendicular to each other.

The process of transferring electric energy from one place to another without the flow of actual electrons is called:
a) Electric current
b) Electric discharge
c) Electric transmission
d) Electric conduction

c) Electric transmission

Which of the following devices is used to protect electrical circuits from excessive current?
a) Resistor
b) Capacitor
c) Fuse
d) Transistor

c) Fuse

The force exerted on a current-carrying wire placed in a magnetic field is known as:
a) Electric force
b) Magnetic force
c) Electromagnetic force
d) Gravitational force

b) Magnetic force

The phenomenon of generating an electric current in a coil of wire by changing the magnetic field around it is the principle behind:
a) Electric motors
b) Electric generators
c) Transformers
d) All of the above

d) All of the above

The direction of the magnetic field lines around a current-carrying loop of wire can be determined using:
a) Right-hand rule
b) Left-hand rule
c) Thumb rule
d) Index finger rule

a) Right-hand rule

Which of the following devices is used to store electrical charge?
a) Resistor
b) Capacitor
c) Diode
d) Transistor

b) Capacitor

The device that converts electrical energy into mechanical energy is called:
a) Battery
b) Generator
c) Transformer
d) Motor

d) Motor

Which of the following statements is true about the magnetic field inside a solenoid?
a) The magnetic field is strongest at the ends of the solenoid.
b) The magnetic field is weakest at the ends of the solenoid.
c) The magnetic field is uniform throughout the solenoid.
d) The magnetic field depends on the direction of current flow.

c) The magnetic field is uniform throughout the solenoid.

The device that converts mechanical energy into electrical energy is called:
a) Battery
b) Generator
c) Transformer
d) Capacitor

b) Generator

Which of the following materials is most commonly used as an insulator in electrical wires?
a) Copper
b) Aluminum
c) Rubber
d) Silver

c) Rubber

The phenomenon of producing a voltage in a conductor by changing the magnetic field around it is called:
a) Electric induction
b) Magnetic induction
d) Magnetic deflection

b) Magnetic induction

The process of transferring electric energy from one place to another without the flow of actual electrons is called:
a) Electric current
b) Electric discharge
c) Electric transmission
d) Electric conduction

c) Electric transmission

What happens to the voltage in a series circuit when more resistors are added?
a) The voltage increases.
b) The voltage decreases.
c) The voltage remains the same.
d) The voltage becomes zero.

b) The voltage decreases.

Which of the following devices is used to step up or step down the voltage in an electrical circuit?
a) Battery
b) Resistor
c) Transformer
d) Capacitor

c) Transformer

The property of a material that opposes the flow of electric current is called:
a) Conductance
b) Resistance
c) Capacitance
d) Inductance

b) Resistance

The SI unit of electric power is:
a) Joule
b) Watt
c) Ampere
d) Ohm

b) Watt

Which of the following materials is most commonly used as a permanent magnet?
a) Aluminum
b) Copper
c) Iron
d) Plastic

c) Iron

The strength of an electric field is determined by:
a) The amount of electric charge
b) The distance from the charge
c) The size of the charge
d) All of the above

d) All of the above

The phenomenon of a sudden, brief flow of electric current between two conductors is called:
a) Voltage drop
b) Electric shock
c) Electric discharge
d) Electromagnetic induction

c) Electric discharge

The device that converts electrical energy into mechanical energy is called:
a) Battery
b) Generator
c) Transformer
d) Motor

d) Motor

What is the relationship between the direction of the electric current in a wire and the direction of the magnetic field it produces?
a) They are parallel to each other.
b) They are perpendicular to each other.
c) They are at a 45-degree angle to each other.
d) There is no relationship between them.

b) They are perpendicular to each other.

The process of transferring electric energy from one place to another without the flow of actual electrons is called:
a) Electric current
b) Electric discharge
c) Electric transmission
d) Electric conduction

c) Electric transmission

Which of the following devices is used to protect electrical circuits from excessive current?
a) Resistor
b) Capacitor
c) Fuse
d) Transistor