Resistors in Series and Parallel, Class 10 Science NCERT Solutions

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. The given symbol is used for representing _______ in a circuit.

Electric bulb

Variable resistance

Wires crossing without joining

A wire joint

Question 1 of 20

2. A student connected four identical light bulbs in a circuit as shown. She observes that the brightness of bulb A varies if some of the switches are closed. In which case will bulb A burn brightest?

S1 and S2 closed with S3 open

S1 closed with S2 and S3 open

S1, S2 and S3 closed

S1, S2 and S3 open

Question 2 of 20

3. When a number of resistors are connected in parallel, then their resultant resistance is ______________ the smallest individual resistance.

Less than

Sometime less and sometimes greater than

Same as

greater than

Question 3 of 20

4. For carrying out the experiment, on finding the equivalent resistance of two resistors connected in series, a student sets up the circuit as shown. On further verification, he finds out that the circuit has one or more of the following faults:

(i) The resistors R₁ and R₂ have not been correctly connected in series

(ii) The voltmeter has not been correctly connected in the circuit

(iii) The ammeter has not been correctly connected in the circuit

Out of these three, the actual fault in the circuit is/are:

Both (i) and (ii)

Both (ii) and (iii)

Only (i)

Only (ii)

Question 4 of 20

5. Two students (A) and (B) connect their two given resistors R₂ and R₂ in the manners shown below.

Student A connects the terminals marked b1 and c1 while student B connects the terminals marked d2 and c2 in their respective circuits at the points marked X and Y.

Which one of the following is correct in relation to above arrangement:-

both the students will determine the equivalent resistance of the series combination of the two resistors

both the students will determine the equivalent resistance of the parallel combination of the two resistors.

Student A will determine the equivalent resistance of series combination while student B will determine the equivalent resistance of parallel combination of the two resistors

Student A will determine the equivalent resistance of the parallel combination while student B will determine the equivalent resistance of the series combination of the two resistors.

Question 5 of 20

6. The statement that is most correct about the following circuit is:

A3 < A2

A1 = A3

A1 = A2 = A3

A1 < A2

Question 6 of 20

7. Four resistors of 4 ohm each are connected in parallel, four such combinations are then connected in series. Their total resistance is

16 Ω

4 Ω

12 Ω

20 Ω

Question 7 of 20

8. The correct set up for studying the dependence of the current on the potential difference across a resistor is:

Question 8 of 20

9. The resistors R₁ and R₂ are connected in

Parallel in both circuits

Series in circuit I and in parallel in circuit II

Parallel in circuit I and in series in circuit II

Series in both circuits

Question 9 of 20

10. Find the total resistance of the given circuit.

2Ω

6Ω

8Ω

14Ω

Question 10 of 20

11. In the experiment on finding the equivalent resistance of two resistors connected in parallel three students connected the Voltmeter in their circuits in the three ways X, Y and Z shown here.

The voltmeter has been correctly connected in.

cases X and Y only

cases Z and X only

cases Y and Z only

all the three cases

Question 11 of 20

12. Two resistors 4Ω and 2Ω are connected in series, and potential difference of 12 V is applied across the combination. Then, the current through the circuit is:

4.5 A

4 A

2 A

1 A

Question 12 of 20

13. The decrease of resistance in parallel combination is due to:

The decrease in effective area of the cross-section.

The increase in effective area of the cross-section.

The decrease in effective length.

None of the above

Question 13 of 20

14. The combined resistance of 6Ω and 12Ω connected in parallel is

6 Ω

2 Ω

18 Ω

4 Ω

Question 14 of 20

15. Three resistors each having same resistance are connected in parallel. Their equivalent resistance is 1

. If they are connected in series, their equivalent resistance will be:

9Ω

3Ω

6Ω

1Ω

Question 15 of 20

16. A resistor of 8 Ω is connected in parallel with another resistor R₂. The resultant resistance of the combination is 4 Ω. Then, the value of resistor R₂ is:

8 Ω

4 Ω

12 Ω

16 Ω

Question 16 of 20

17. Calculate the equivalent resistance from the following combination of resistors.

1Ω

1.5Ω

3Ω

2Ω

Question 17 of 20

18. A uniform conducting wire offers a resistance of 60 Ω. It is cut into 12 equal parts and 6 of them are connected in parallel and remaining 6 are connected in series. This parallel bundle is connected in series with the series chain. Then, find the net resistance.

30.84 Ω

32.84 Ω

29.84 Ω

31.84 Ω

Question 18 of 20

19. Four resistors are connected in Parallel. Each has a resistance 2. The effective resistance is:

8Ω

4Ω

0.25Ω

0.5Ω

Question 19 of 20

20. To determine the equivalent resistance of a series combination of two resistors R1 and R2, a student arranges the following set up

Which of the following statements will be true for this circuit:

Incorrect reading for current I as well as potential difference V

Correct reading for current I incorrect reading for potential difference V

Incorrect reading for current I but correct reading for potential difference V

Correct reading for both current I and potential difference V

Question 20 of 20