Class 12 Physics MCQ Test – Current Electricity (Chapter 3) | Full Chapter Test

Class 12 Physics

Chapter 3: Current Electricity - Full Test

Time Left: 5:00

Student Name:

1. Drift velocity is proportional to:

Electric field Current Resistance Temperature

2. A wire stretched to double length → new resistance:

2R 3R 4R R/2

3. Mobility μ equals:

v/E E/v I/V qE

4. Kirchhoff’s loop rule is based on:

Charge conservation Energy conservation Momentum None

5. Current when emf = 10V, r=2Ω, R=3Ω:

1A 2A 3A 4A

6. Balanced Wheatstone bridge condition:

P/Q = R/S P+Q=R+S PR=QS None

7. Temperature coefficient (metals):

Negative Positive Zero Infinite

8. V-I graph non-ohmic:

Straight line Curve Parallel None

9. Power max when:

R=r R=0 R=∞ Independent

10. Unit of resistivity:

Ω Ωm V A

Vedant Classes | Class 12 Physics