Series Circuits problems
- 1. A series circuit has a 24 V source and a total resistance of 120 Ω. The current through each resistor is
Options- A. 24 mA
- B. 200 mA
- C. 120 mA
- D. 20 mA Discuss
Correct Answer: 200 mA
- 2. A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 Ω. If each resistor is operating in the circuit at its maximum power dissipation, total current flow is
Options- A. 27 mA
- B. 2.7 mA
- C. 19 mA
- D. 190 mA Discuss
Correct Answer: 27 mA
Explanation:
Total P = P1 + P2 + P3 = 7/8w.
P = I2R.
I = sqrt (P/R)
Now, P = 7/8w, R = 1200 ohm.
Therefore,
I= sqrt ( (7/8)/1200 ) = 0.0270030862 = 27 mA.
P = I2R.
I = sqrt (P/R)
Now, P = 7/8w, R = 1200 ohm.
Therefore,
I= sqrt ( (7/8)/1200 ) = 0.0270030862 = 27 mA.
- 3. Three 680 Ω resistors are connected in series with a 470 V source. Current in the circuit is
Options- A. 69 mA
- B. 230 mA
- C. 23 mA
- D. 690 mA Discuss
Correct Answer: 230 mA
- 4. All the voltage drops and the source voltage added together in a series circuit is equal to
Options- A. the total of the voltage drops
- B. the source voltage
- C. zero
- D. the total of the source voltage and the voltage drops Discuss
Correct Answer: zero
- 5. There are five resistors in a given series circuit and each resistor has 6 V dropped across it. The source voltage
Options- A. is 6 V
- B. depends on the current flow
- C. depends on the resistor values
- D. is 30 V Discuss
Correct Answer: is 30 V
- 6. The total resistance of a series circuit is equal to the difference between the largest and smallest value resistors.
Options- A. True
- B. False Discuss
Correct Answer: False
- 7. The term series opposing means that sources are in series with opposite polarities.
Options- A. True
- B. False Discuss
Correct Answer: True
- 8. A series circuit acts as a current divider.
Options- A. True
- B. False Discuss
Correct Answer: False
- 9. A short in a series circuit prevents current.
Options- A. True
- B. False Discuss
Correct Answer: False
- 10. If you know the current anywhere in a series circuit, you know the current everywhere in a series circuit.
Options- A. True
- B. False Discuss
Correct Answer: True
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