Revise Class 10 Science – Electricity with Our MCQ Mock Test!

How well do you understand the flow of electric current and the principles that govern electrical circuits? Test your knowledge with this MCQ-based mock test on Electricity. Designed as per the latest CBSE Class 10 Science syllabus, it covers all the key topics including electric current, potential difference, Ohm’s Law, resistance and resistivity, factors affecting resistance, series and parallel combinations of resistors, heating effect of electric current, and the practical applications of electric power.

This test is the perfect way to revise crucial concepts, practice exam-oriented questions, and build your confidence. With thoughtfully crafted multiple-choice questions, you can evaluate your understanding, enhance speed and accuracy, and get fully prepared for school and board exams.

Attempt now and make Electricity one of your strongest chapters!

1. Two heater wires of same length and same material but of different thickness are connected in series across a power supply. The power dissipated will be

 
 
 
 

2.  

For determining the equivalent resistance of two resistors R1 and R2 connected in series, three students X, Y and Z set up their circuits as shown below:

The correct set up is that of

 
 
 
 

3. Which circuit shows the correct and safe position for the fuse and switch?

 
 
 
 

4. An electric iron of 1500 W, 200 V and a flash light of 500 W, 200 V are used in homes. The rating of fuse to be used should be

 
 
 
 

5. In your daily life experience, which of the following is not used in series combination?

 
 
 
 

6. If a person has five resistors each of value  then the maximum resistance he can obtain by connecting them is

 
 
 
 

7. Elements of electric heating devices, such as bread toasters and electric iron are generally made up of

 
 
 
 

8. Three resistors of resistance 1 Ω, 2Ω and 3 Ω are connected in series combination and draw the current 0.5 A from the power source. The potential difference across the combination is

 
 
 
 

9. Magnitude of current in different branches of the parallel combination is

 
 
 
 

10. According to Joule’s law of heating, the heat produced in a resistor in time t is

 
 
 
 

11. The resistivity of the metals and alloys are in the range of

 
 
 
 

12. In series combination of resistors, the flow of current across each resistor is

 
 
 
 

13. One kilowatt hour is equal to

 
 
 
 

14. Pick out the incorrect statement from the following about series combination of resistors.

 
 
 
 

15. The fuse wire should have a

 
 
 
 

16. The total current in parallel combination of three resistors is

 
 
 
 

17. If R1 and R2 are respectively the filament resistances of a 200 W bulb and 100 W bulb design to operate on the same voltage, then

 
 
 
 

18. The resistor R1 and R2 are connected in parallel the equivalent resistance of the combination is

 
 
 
 

19. For maximum power consumption, all given resistors should be connected in

 
 
 
 

20. Which of the following does not represent electric power?

 
 
 
 

21. Which of the following is used almost exclusively for filaments of electric lamp?

 
 
 
 

22. 50 J heat is produced each second in a 2 Ω resistor. The potential difference across the resistor is

 
 
 
 

23. Two bulbs of 100 W and 40 W are connected in series. The current through the 100 W bulb is 1 A. The current through the 40 W bulb will be:

 
 
 
 

24. Water boils in an electric kettle in 18 minutes after switching on. If the length of heating wire is decreased to 1/3rd of its initial value, then the same amount of water will boil with the same supply of voltage in

 
 
 
 

25. The equivalent resistance of the resistors connected in parallel is

 
 
 
 

26. An electric fuse is based on

 
 
 
 

27. Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is

 
 
 
 

28. In a resistive circuit if the current is increased to two times, the percentage change in the amount of heat dissipated in the circuit would be:

 
 
 
 

29. The resistance of resistor is reduced to half of its initial value. If other parameters of the circuit remain unchanged, the amount of heat produced in the resistor will become

 
 
 
 

30. Two LED bulbs of 12 W and 6 W are connected in series. If the current through 12 W bulb is 0.06 A, the current through 6 W bulb will be

 
 
 
 

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