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.

Plastic insulation surrounds a wire having diameter d and length l as shown above. A decrease in the resistance of the wire would be produced by an increase in the

 
 
 
 

2. In the experiment on studying the dependence of current (I) and potential difference (V), three students plotted the following graph between (V) and (I) as per their respective observations.

 

The observation likely to be correct are those of

 
 
 
 

3. When a 4 V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resistor is

 
 
 
 

4. Choose the incorrect statement regarding Ohm’s law.

 
 
 
 

5. A complete circuit is left on for several minutes, causing the connecting copper wire to become hot. As the temperature of the wire increases, the electrical resistance of the wire

 
 
 
 

6. Which of the following is an essential element in an electric circuit?

 
 
 
 

7. SI unit of electric current is

 
 
 
 

8. A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross-section

 
 
 
 

9. The value of 1 mA and 1 μA are

 
 
 
 

10. The value of specific resistance depends upon

 
 
 
 

11. In Ohm‘s law, if physical condition of the conductor remains same, then

 
 
 
 

12. The unit of electric charge is

 
 
 
 

13. Amount of charge flowing through a particular area in unit time is called

 
 
 
 

14. For verifying Ohm’s law, we design an electric circuit diagram in which we show the arrangement of different circuit components. We find that with respect to resistor

 
 
 
 

15. Conventionally, direction of electric current in the circuit is taken as the direction of flow of

 
 
 
 

16. The particles that constitute the flow of charge through a conductor is

 
 
 
 

17. The number of electrons constituting one coulomb of charge is

 
 
 
 

18. To the terminals marked as X and Y in the given circuit, three students connect 4 cells of voltage 1.5 V each in three different manners shown below.

Which of the following student(s) get the maximum reading of voltmeter?

 
 
 
 

19. A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively. Which of the following is true?

 
 
 
 

20. A cylindrical conductor of length ‘l’ and uniform area of cross-section ‘A’ has resistance ‘R’. Another conductor of length 2.5l and resistance 0.5R of the same material has area of cross-section

 

 
 
 
 

21. The electric current in the conductor exists only when the quantity that flows through it is

 
 
 
 

22. The relation between electric current and electric charge is

 
 
 
 

23. What is the maximum resistance which can be made using five resistors each of 1/5 W?

 
 
 
 

24. The resistivity does not change if

 
 
 
 

25. Choose the incorrect statements from the following:

 
 
 
 

26. If the current I through a resistor is increased by 100 % (assume that temperature remains unchanged), the increase in power dissipated will be

 
 
 
 

27. A schematic diagram drawn by using symbols which represent electrical components is called

 
 
 
 

28. In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be

 
 
 
 

29. Identify the electrical components labelled as A, B, C and D.

 
 
 
 

30. The materials which allow electric current to pass through them easily are called

 
 
 
 

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