300+ TOP MCQs on Series and Parallel Circuits and Answers

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MCQs on Series and Parallel Circuits :

1. A certain circuit is composed of two parallel resistors. The total resistance is 1,403 Ω. One of the resistors is 2 Ω. The other resistor value is
(A) 1,403 Ω
(B) 4.7 kΩ
(C) 2 kΩ
(D) 3,403 Ω

Answer

Answer: (B) 4.7 kΩ

2. A voltage divider consists of ot two 100 kΩ resistors and a 12 V source. What will the voltage be if a load resistor of 1 MΩ is connected to the output?
(A) 0.57 V
(B) 6 V
(C) 12 V
(D) 5.7 V

Answer

Answer: (D) 5.7 V

3. The parallel combination of a 1.5 kΩ resistor and 470 Ω resistor is in series with the parallel combination of five 1 kΩ resistors. The source voltage is 50 V. The percentage of the load current through any single 1 kΩresistor is
(A) 25 %
(B) 20 %
(C) 100 %
(D) 50 %

Answer

Answer: (B) 20 %

4. On which of the following voltage range settings will a voltameter present minimum load on a circuit?
(A) 1 V
(B) 50 V
(C) 500 V
(D) 1,000 V

Answer

Answer: (D) 1,000 V

5. A Voltage divider consists of two 68 kΩ resistors and a 24 V source. The unknown output voltage is
(A) 12 V
(B) 24 V
(C) 0 V
(D) 6 V

Answer

Answer: (A) 12 V

6. Two 3.3 kΩ resistors are in series combination are in parallel with a 4.7 kΩ resistor. What will be the voltage across the 4.7 kΩ resistors if the voltage across one of the 3.3 kΩ resistors is 12 V
(A) 24 V
(B) 12 V
(C) 0 V
(D) 6 V

Answer

Answer: (A) 24 V

7. The 1.2 kΩ resistors are in series and this series combination is in parallel with a 3.3 3.3 kΩ resistor. The total resistance is
(A) 138 Ω
(B) 1,389 Ω
(C) 5,700 Ω
(D) 880 Ω

Answer

Answer: (B) 1,389 Ω

8. A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage?
(A) 1 MΩ
(B) 100 kΩ
(C) 1 kΩ
(D) 330 Ω

Answer

Answer: (A) 1 MΩ

9. A certain Wheatstone bridge has the following resistor values: R1= 10 kΩ, R2 = 720 Ω and R4 = 2.4 kΩ. The unknown resistance is
(A) 24 Ω
(B) 2.4 Ω
(C) 300 Ω
(D) 3,000 Ω

Answer

Answer: (D) 3,000 Ω

10. In a certain five-step R/2R ladder network, the smallest resistor value is
(A) Indeterminable
(B) 2 kΩ
(C) 10 kΩ
(D) 20 kΩ

Answer

Answer: (B) 2 kΩ