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series parallel circuits MCQs

Practise focused series parallel circuits questions with marked answers for exam preparation and subject revision.

series parallel circuits Mcqs

1. The parallel combination of a 6.8 k? resistor and a 10 k? resistor is in series with the parallel combination of a 2.2 k? resistor and a 1 k? resistor. A 100 V source is connected across the circuit. The resistor(s) with the greatest voltage drop is (are)___________?
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A. 6.8 k?

B. 2.2 k?

C. 2.2 k? and 1 k?

D. 6.8 k? and 10 k?

2. The parallel combination of a 470 ? resistor and a 1.2 k? resistor is in series with the parallel combination of three 3 k? resistors. A 200 V source is connected across the circuit. The resistor with the most current has a value of____________?
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A. 470 ?

B. 3 k?

C. 1.2 k?

D. 470 ? or 1.2 k?

3. Three 10 k? resistors are connected in series. A 20 k? resistor is connected in parallel across one of the 10 k? resistors. The voltage source is 24 V. The total current in the circuit is___________?
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A. 900 ?A

B. 800 ?A

C. 90 mA

D. 9 mA

4. In a certain five-step R/2R ladder network, the smallest resistor value is 1 k?. The largest value is___________?
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A. Indeterminable

B. 10 k?

C. 20 k?

D. 2 k?

5. A voltage divider consists of two 100 k? resistors and a 12 V source. What will the output voltage be if a load resistor of 1 M? is connected to the output?
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A. 0.57 V

B. 5.7 V

C. 12 V

D. 6 V

6. A voltage divider consists of two 68 k? resistors and a 24 V source. The unknown output voltage is______________?
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A. 6 V

B. 0 V

C. 24 V

D. 12 V

7. A certain voltage divider consists of three 1 k? resistors in series. Which of the following load resistors will have the least effect on the output voltage?
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A. 100 k?

B. 330 ?

C. 1 M?

D. 1 k?

8. Two 3.3 k? resistors are in series and this series combination is in parallel with a 4.7 k? resistor. The voltage across one of the 3.3 k? resistors is 12 V. The voltage across the 4.7 k? resistor is_________?
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A. 12 V

B. 0 V

C. 6 V

D. 24 V

9. If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?
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A. increases

B. remains the same

C. cannot tell

D. decreases

10. The parallel combination of a 470 ? resistor and a 1.5 k? resistor is in series with the parallel combination of five 1 k? resistors. The source voltage is 50 V. The percentage of the load current through any single 1 K? resistor is__________?
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A. 50%

B. 100%

C. 20 %

D. 25%

11. A certain Wheatstone bridge has the following resistor values: R1 = 10 k?, R2 = 720 ?, and R4 = 2.4 k?. The unknown resistance is_____________?
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A. 2.4 ?

B. 300 ?

C. 3,000 ?

D. 24 ?

12. The current flowing through an unloaded voltage divider is called the____________?
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A. resistor current

B. bleeder current

C. load current

D. voltage current

13. A Wheatstone bridge can be used to determine an unknown_____________?
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A. current

B. resistance

C. voltage

D. power

14. With 21 V applied, if R1 = 5 ohms, R2 = 35 ohms, and R3 = 14 ohms, what is the current of R2 if R1 is series connected with parallel circuit R2 and R3?
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A. 200 mA

B. 600 mA

C. 800 mA

D. 400 mA

15. A device able to supply electrical energy is a __________?
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A. battery

B. conductor

C. nonconductor

D. microwave

16. The positive (+) and negative (-) ends of the battery are called ___________?
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A. battery knobs

B. circuit diagram

C. battery sides

D. battery terminals

17. In a seriesparallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2s voltage will:___________?
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A. increase

B. cannot tell

C. remain the same

D. decrease

18. In a seriesparallel circuit, individual component power dissipation are calculated using_____________?
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A. a percent of the voltage division ratio squared

B. a percent of the total power depending on resistor ratios

C. individual component parameters

D. total current squared multiplied by the resistor values

19. A certain voltage divider consists of two 12 k? resistors in series. Which of the following load resistors will have the most effect on the output voltage?
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A. 24 k?

B. 18 k?

C. 12 k?

D. 1 M?

20. The parallel combination of a 470 ? resistor and a 680 ? resistor is in series with the parallel combination of four 2 k? resistors. The total resistance is___________?
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A. 1,650 ?

B. 77.8 ?

C. 1,078 ?

D. 778 ?

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