MCQ- 2 ICSE Physics class 10 ch-4 Electricity and Magnetism

Electromotive Force (EMF) Quiz - Class 10 Electricity

1. What is the unit of Electromotive Force (EMF)?

ampere
volt
ohm
watt

Correct Answer: volt

2. Which device is commonly used to measure EMF in a circuit?

Ammeter
Voltmeter
Galvanometer
Ohmmeter

Correct Answer: Voltmeter

3. The electromotive force (EMF) of a cell is defined as:

Energy used per coulomb of charge
Energy supplied per coulomb of charge
Energy converted per joule
Charge multiplied by time

Correct Answer: Energy supplied per coulomb of charge

4. If the EMF of a cell is 12 V and the internal resistance is 2 Ω, what will be the voltage drop if 3 A current flows?

3 V
6 V
6 V
12 V

Correct Answer: 6 V (V = IR)

5. The EMF of a cell remains constant when:

Current increases
No current flows
Resistance increases
Circuit breaks

Correct Answer: No current flows