# 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**

*R*_{3}. The voltage across*R*_{3}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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