Current Electricity Mock Test

1. A wire of resistance 10Ω carries a current of 2A for 5 minutes. Heat produced is:

2. A 12V battery is connected across a resistor and current becomes 3A. Resistance is:

3. Two resistors 6Ω and 3Ω are connected in parallel. Equivalent resistance is:

4. Drift velocity of electrons depends directly upon:

5. A current of 0.5A flows through a conductor for 20s. Total charge passed is:

6. A 4Ω resistor and an 8Ω resistor are connected in series across 24V. Current in the circuit is:

7. A 10Ω and 15Ω resistor are connected in parallel. Equivalent resistance is:

8. A wire of resistance 5Ω is stretched to three times its length. New resistance is:

9. A cell of emf 10V and internal resistance 1Ω is connected to a 4Ω resistor. Current is:

10. A 100W, 200V bulb has resistance:

11. A current of 4A flows through 2Ω resistor for 10s. Heat produced is:

12. Three resistors 2Ω, 3Ω and 6Ω are connected in parallel. Equivalent resistance is:

13. A conductor carries 120C charge in 1 minute. Current is:

14. A 60W bulb is used for 5 hours. Electrical energy consumed is:

15. If voltage across a resistor is doubled, power becomes:

16. For maximum power transfer, external resistance R should be equal to:

17. A 50V source supplies 2A current. Power supplied is:

18. A wire has resistance R. If its area is doubled keeping length same, resistance becomes:

19. A 5Ω resistor and 10Ω resistor are connected in parallel. Equivalent resistance is approximately:

20. A 220V heater draws 5A current. Power consumed is: