Series-Parallel Circuits problems
- 1. A 12 kΩ resistor, a 15 kΩ resistor, and a 22 kΩ resistor are in series with two 10 kΩ resistors that are in parallel. The source voltage is 75 V. Current through the 15 kΩ resistor is approximately
Options- A. 14 mA
- B. 1.4 mA
- C. 5 mA
- D. 50 mA Discuss
Correct Answer: 1.4 mA
- 2. A certain voltage divider consists of two 12 kΩ resistors in series. Which of the following load resistors will have the most effect on the output voltage?
Options- A. 1 MΩ
- B. 24 kΩ
- C. 18 kΩ
- D. 12 kΩ Discuss
Correct Answer: 12 kΩ
- 3. A certain Wheatstone bridge has the following resistor values: R1 = 10 kΩ, R2 = 720 Ω, and R4 = 2.4 kΩ. The unknown resistance is
Options- A. 24 Ω
- B. 2.4 Ω
- C. 300 Ω
- D. 3,000 Ω Discuss
Correct Answer: 3,000 Ω
- 4. The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is
Options- A. 20,000 Ω
- B. 100,000 Ω
- C. 200,000 Ω
- D. 1,000,000 Ω Discuss
Correct Answer: 100,000 Ω
- 5. The parallel combination of a 470 Ω resistor and a 680 Ω resistor is in series with the parallel combination of four 2 kΩ resistors. The total resistance is
Options- A. 1,650 Ω
- B. 1,078 Ω
- C. 77.8 Ω
- D. 778 Ω Discuss
Correct Answer: 778 Ω
- 6. A certain circuit is composed of two parallel resistors. The total resistance is 1,403 Ω. One of the resistors is 2 kΩ. The other resistor value is
Options- A. 1,403 Ω
- B. 4.7 kΩ
- C. 2 kΩ
- D. 3,403 Ω Discuss
Correct Answer: 4.7 kΩ
- 7. When a load resistance is removed from the output of a voltage divider circuit, the current drawn from the source
Options- A. decreases
- B. increases
- C. remains the same
- D. is cut off Discuss
Correct Answer: decreases
- 8. Two 3.3 kΩ resistors are in series and this series combination is in parallel with a 4.7 kΩ resistor. The voltage across one of the 3.3 kΩ resistors is 12 V. The voltage across the 4.7 kΩ resistor is
Options- A. 24 V
- B. 12 V
- C. 0 V
- D. 6 V Discuss
Correct Answer: 24 V
- 9. On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
Options- A. 1 V
- B. 50 V
- C. 500 V
- D. 1,000 V Discuss
Correct Answer: 1,000 V
- 10. The parallel combination of a 6.8 kΩ resistor and a 10 kΩ resistor is in series with the parallel combination of a 2.2 kΩ resistor and a 1 kΩ resistor. A 100 V source is connected across the circuit. The resistor(s) with the greatest voltage drop is (are)
Options- A. 6.8 kΩ
- B. 2.2 kΩ
- C. 6.8 kΩ and 10 kΩ
- D. 2.2 kΩ and 1 kΩ Discuss
Correct Answer: 6.8 kΩ and 10 kΩ
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