# Series Parallel Circuit MCQ [Free PDF] – Objective Question Answer for Series Parallel Circuit Quiz

1. It is preferable to connect bulbs in series or parallel?

A. Series
B. Parallel
C. Both series and parallel
D. Neither series nor parallel

Bulbs are connected in parallel so that even if one of the bulbs blows out, the others continue to get a current supply.

2. Calculate the total resistance between points A and B.

A. 7 ohm
B. 0 ohm
C. 7.67 ohm
D. 0.48 ohm

1 ohm in parallel with 2 ohms gives 2/3 ohm equivalent which is in series with 4 ohms and 3 ohms

so total resistance between A and B = 4 + 2/3 + 3 = 23/3 = 7.67 ohm.

3. Calculate the equivalent resistance between A and B.

A. 60 ohm
B. 15 ohm
C. 12 ohm
D. 48 ohm

5 ohms and 15 ohms are connected in series to give 20 ohm.10ohm and 20 ohms are connected in series to give 30 ohms. Now both equivalent resistances (20ohm and 30 ohms) are in parallel to give equivalent resistance

20 × 30/(20+30) = 12 ohms.

4. Calculate the resistance between A and B.

A. 3.56 ohm
B. 7 ohm
C. 14.26 ohm
D. 29.69 ohm

The 1 ohm, 2 ohms, and 3 − ohm resistors are connected in parallel. Its equivalent resistance is in series with the 4 − ohm resistor and the parallel connection of the 5 ohms and 6 − ohm resistor.

The equivalent resistance of this combination is 80/11 ohm. This is in parallel with 7 ohms to give equivalent resistance between A and B is 3.56 ohm.

5. Batteries are generally connected in______

A. Series
B. Parallel
C. Either series or parallel
D. Neither series nor parallel

Batteries are generally connected in series so that we can obtain the desired voltage since voltages add up once they are connected in series.

6. In a _________ circuit, the total resistance is greater than the largest resistance in the circuit.

A. Series
B. Parallel
C. Either series or parallel
D. Neither series nor parallel

In series circuits, the total resistance is the sum of all the resistance in the circuit, hence the total is greater than the largest resistance.

7. In a ____________ circuit, the total resistance is smaller than the smallest resistance in the circuit.

A. Series
B. Parallel
C. Either series or parallel
D. Neither series nor parallel

In a parallel circuit, the equivalent resistance = 1/sum of the reciprocals of all the resistances in the circuit. Hence it is smaller than the smallest resistance in the circuit.

8. Which is the most cost-efficient connection?

A. Series
B. Parallel
C. Either series or parallel
D. Neither series nor parallel

The advantage of series connections is that they share the supply voltage, hence cheap low voltage appliances may be used.

9. Calculate the equivalent resistance between A and B.

A. 2 ohm
B. 4 ohm
C. 6 ohm
D. 8 ohm

R = ((2+3)||5)+1.5)||4.

The 2 and the 3 − ohm resistor are in series. The equivalent of these two resistors is in parallel with the 5 − ohm resistor.

The equivalent of these three resistances is in series with the 1.5 − ohm resistor. Finally, the equivalent of these resistances is in parallel with the 4 − ohm resistor.

10. Calculate the equivalent resistance between A and B.

A. 6.67 ohm
B. 46.67 ohm
C. 26.67 ohm
D. 10.67 ohm