Series Circuits Objective Questions and Answers - ObjectiveBooks

# Practice Test: Question Set - 03

1. When one of three series resistors is removed from a circuit and the circuit is reconnected, the current
(A) Increases
(B) Increases by one-third
(C) Decreases by one-third
(D) Decreases by the amount of current through the removed resistor

2. A string of five series resistors is connected across a 6 V battery. Zero voltage is measured across all resistors except R3. The voltage across R3 is
(A) 0 V
(B) 1.2 V
(C) 6 V
(D) 0.6 V

3. When a fourth resistor is connected in series with three resistors, the total resistance
(A) Increases by one-fourth
(B) Increases
(C) Decreases
(D) Remains the same

4. 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
(A) 3 A
(B) 1 A
(C) 4 A
(D) 0.3 A

5. A short in a series circuit prevents current.
(A) True
(B) False

6. Two 1.5 V cells are connected series opposing across two 100 Ω resistors in series. Total current flow is
(A) 15 mA
(B) 5 mA
(C) 2 mA
(D) 0 A

7. Three 680 Ω resistors are connected in series with a 470 V source. Current in the circuit is
(A) 69 mA
(B) 230 mA
(C) 23 mA
(D) 690 mA

8. A series circuit acts as a voltage divider.
(A) True
(B) False

9. Which of the following series combinations dissipates the most power when connected across a 120 V source?
(A) One 220 Ω resistor
(B) Two 220 Ω resistors
(C) Three 220 Ω resistors
(D) Four 220 Ω resistors

10. A series circuit has a 24 V source and a total resistance of 120 Ω. The current through each resistor is
(A) 24 mA
(B) 200 mA
(C) 120 mA
(D) 20 mA

11. A series circuit acts as a current divider.
(A) True
(B) False

12. A series circuit consists of three resistors with values of 120 Ω, 270 Ω, and 330 Ω. The total resistance is
(A) Less than 120 Ω
(B) The average of the values
(C) 720 Ω
(D) 120 Ω

13. 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
(A) 60 mA
(B) 30 mA
(C) 6 mA
(D) 300 mA

14. If a 6 V and a 9 V source are connected series aiding, the total voltage is
(A) 6 V
(B) 9 V
(C) 3 V
(D) 15 V

15. Four equal-value resistors are in series with a 12 V battery and 13.63 mA are measured. The value of each resistor is
(A) 22 Ω
(B) 220 Ω
(C) 880 Ω
(D) 88 Ω

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