Series Circuits problems
- 1. A series circuit consists of three resistors with values of 120 Ω, 270 Ω, and 330 Ω. The total resistance is
Options- A. less than 120 Ω
- B. the average of the values
- C. 720 Ω
- D. 120 Ω Discuss
Correct Answer: 720 Ω
- 2. Two resistors are in series: a 5.6 kΩ resistor and a 4.7 kΩ resistor. The voltage drop across the 5.6 kΩ resistor is 10 V. The voltage across the 4.7 kΩ resistor is
Options- A. 8.39 V
- B. 10 V
- C. 2.32 V
- D. 0 V Discuss
Correct Answer: 8.39 V
- 3. Two 6 V batteries are connected series aiding across two 1.2 kΩ resistors in series. Current through each resistor is
Options- A. 5 mA
- B. 10 mA
- C. 0 A
- D. 2.5 mA Discuss
Correct Answer: 5 mA
- 4. When a fourth resistor is connected in series with three resistors, the total resistance
Options- A. increases by one-fourth
- B. increases
- C. decreases
- D. remains the same Discuss
Correct Answer: increases
- 5. Four equal-value resistors are in series with a 12 V battery and 13.63 mA are measured. The value of each resistor is
Options- A. 22 Ω
- B. 220 Ω
- C. 880 Ω
- D. 88 Ω Discuss
Correct Answer: 220 Ω
Explanation:
Total Resistance, r = 12 / 13.63
= 0.880 in ohms
Total Resistance, r= 880
Each resistance value = r/4
= 880/4
Each resistance value = 220 ohms.
- 6. The following resistors (one each) are connected in a series circuit: 470 Ω, 680 Ω, 1 kΩ, and 1.2 kΩ. The voltage source is 20 V. Current through the 680 Ω resistor is approximately
Options- A. 60 mA
- B. 30 mA
- C. 6 mA
- D. 300 mA Discuss
Correct Answer: 6 mA
- 7. Five resistors are connected in a series and there is a current of 3 A into the first resistor. The amount of current into the second resistor is
Options- A. 3 A
- B. 1 A
- C. 4 A
- D. 0.3 A Discuss
Correct Answer: 3 A
- 8. A series circuit consists of a 4.7 kΩ, a 12 kΩ, and a 2.2 kΩ resistor. The resistor that has the most voltage drop is
Options- A. the 12 kΩ
- B. the 2.2 kΩ
- C. the 4.7 kΩ
- D. impossible to determine from the given information Discuss
Correct Answer: the 12 kΩ
- 9. A series circuit consists of three resistors. Two resistors are 1.2 kΩ each. The total resistance is 12 kΩ. The value of the third resistor
Options- A. is 9,600 Ω
- B. is 960 Ω
- C. is 1.2 kΩ
- D. cannot be determined Discuss
Correct Answer: is 9,600 Ω
- 10. The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates
Options- A. 12 W
- B. 48 W
- C. 3 W
- D. 8 W Discuss
Correct Answer: 3 W
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