MCQ- 1 ICSE Physics class 10 ch-4 Electricity and Magnetism

Ohm's Law Quiz - Class 10 Electricity

1. According to Ohm's Law, the relationship between voltage (V), current (I), and resistance (R) is:

V = IR
V = I/R
I = VR
R = VI

Correct Answer: V = IR

2. If the resistance in a circuit doubles, the current will:

Double
Halve
Remain constant
Increase

Correct Answer: Halve

3. The SI unit of resistance is:

ampere
Volt
ohm (Ω)
watt

Correct Answer: ohm (Ω)

4. If a 12 V battery supplies a current of 3 A, the resistance in the circuit is:

4 Ω
4 Ω
36 Ω
0.25 Ω

Correct Answer: 4 Ω (R = V/I)

5. When no current flows in a circuit despite the voltage applied, it is likely due to:

High voltage
Infinite resistance (open circuit)
High current
Low resistance

Correct Answer: Infinite resistance (open circuit)