Electricity and magnetism Quiz. Electricity and magnetism are important branches of physics that deal with electric charges, electric current, circuits, magnets, and magnetic fields. These concepts are used in many everyday devices such as phones, fans, generators, radios, and electric bulbs. Understanding electricity and magnetism helps students to know how electrical appliances work and how energy is transmitted.
ELECTRICITY AND MAGNETISM – OBJECTIVE QUESTIONS
1. Electricity is the flow of
A. Heat energy
B. Electric charges
C. Sound waves
D. Light rays
2. The SI unit of electric current is
A. Volt
B. Ampere
C. Ohm
D. Watt
3. An instrument used to measure electric current is called
A. Voltmeter
B. Ammeter
C. Galvanometer
D. Thermometer
4. The SI unit of voltage is
A. Ampere
B. Ohm
C. Volt
D. Watt
5. Which instrument is used to measure voltage?
A. Ammeter
B. Thermometer
C. Voltmeter
D. Barometer
Electricity and magnetism Quiz
6. The opposition to the flow of current is called
A. Voltage
B. Power
C. Resistance
D. Energy
7. The SI unit of resistance is
A. Volt
B. Ampere
C. Ohm
D. Watt
8. Ohm’s law states that
A. V = IR
B. I = VR
C. R = VI
D. V = I/R²
9. A device used to control the flow of current is called
A. Bulb
B. Switch
C. Battery
D. Wire
10. A material that allows electricity to pass easily is called
A. Insulator
B. Conductor
C. Resistor
D. Semiconductor
Electricity and magnetism Quiz
11. Which of the following is a good conductor?
A. Rubber
B. Glass
C. Copper
D. Plastic
12. A material that does not allow current to pass is called
A. Conductor
B. Insulator
C. Magnet
D. Resistor
13. Which of the following is an insulator?
A. Iron
B. Silver
C. Plastic
D. Aluminium
14. Electric power is measured in
A. Joule
B. Watt
C. Volt
D. Ohm
15. The formula for electric power is
A. P = VI
B. P = IR
C. P = V/R
D. P = I/R
16. A battery is used to
A. Store light
B. Produce heat
C. Supply electrical energy
D. Reduce resistance
17. A circuit in which current flows is called
A. Open circuit
B. Closed circuit
C. Short circuit
D. Broken circuit
18. A circuit with a break is called
A. Closed circuit
B. Short circuit
C. Open circuit
D. Complete circuit
19. A magnet has how many poles?
A. One
B. Two
C. Three
D. Four
20. The two poles of a magnet are
A. East and West
B. Up and Down
C. North and South
D. Left and Right
Electricity and magnetism Quiz
21. Like poles of magnets
A. Attract each other
B. Repel each other
C. Destroy each other
D. Combine together
22. Unlike poles of magnets
A. Repel each other
B. Attract each other
C. Cancel each other
D. Separate completely
23. The region around a magnet where its effect is felt is called
A. Magnetic force
B. Magnetic field
C. Electric field
D. Energy field
24. A current-carrying conductor produces
A. Heat only
B. Light only
C. Magnetic field
D. Sound only
25. An electromagnet works when
A. There is heat
B. There is light
C. Electric current flows
D. There is friction
Electricity and magnetism Quiz Answers And Explanations
1. Answer: B
Electricity is produced by the movement of electric charges, mainly electrons, through a conductor.
2. Answer: B
The standard unit used to measure electric current is the ampere.
3. Answer: B
An ammeter is specially designed to measure the amount of current flowing in a circuit.
4. Answer: C
Voltage is measured in volts and it shows the electrical pressure in a circuit.
5. Answer: C
A voltmeter is used to measure the potential difference between two points.
6. Answer: C
Resistance is the opposition offered by a material to the flow of electric current.
7. Answer: C
The SI unit of resistance is the ohm.
8. Answer: A
Ohm’s law states that voltage is equal to current multiplied by resistance.
9. Answer: B
A switch is used to turn a circuit on or off, controlling the flow of current.
10. Answer: B
A conductor allows electric charges to flow easily through it.
11. Answer: C
Copper is widely used in wiring because it conducts electricity very well.
12. Answer: B
An insulator prevents the flow of electric current.
13. Answer: C
Plastic does not allow electricity to pass, so it is an insulator.
14. Answer: B
Electric power is measured in watts and shows the rate of energy usage.
15. Answer: A
Electric power is calculated by multiplying voltage and current.
16. Answer: C
A battery supplies electrical energy needed to operate a circuit.
17. Answer: B
A closed circuit allows current to flow continuously.
18. Answer: C
An open circuit has a break, so current cannot flow.
19. Answer: B
Every magnet has two poles: north and south.
20. Answer: C
The poles of a magnet are called north and south poles.
21. Answer: B
Like poles push each other away, so they repel.
22. Answer: B
Unlike poles pull each other together, so they attract.
23. Answer: B
A magnetic field is the area around a magnet where its force is felt.
24. Answer: C
When current flows in a conductor, it produces a magnetic field around it.
25. Answer: C
An electromagnet becomes magnetic only when electric current flows through it.
RELATED QUIZ