# Practice Test: Question Set - 01

**1. If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?**

- (A) 8 V

- (B) 320 V

- (C) 3.2 V

- (D) 32
V

**2. When 12 V are applied across a 68 Î© resistor, the current is**

- (A) 816 mA

- (B) 17.6
mA

- (C) 176 mA

- (D) 8.16
mA

**3. What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?**

- (A) 8.2
kÎ©

- (B) 820 Î©

- (C) 8.2 Î©

- (D) 82 Î©

**4. The formula for finding resistance when current and voltage are known is**

*R = I/V.*- (A) True

- (B) False

**5. Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?**

- (A) 4 Î©

- (B) 400 Î©

- (C) 4 kÎ©

- (D) 4.4 Î©

**6. How much current is produced by a voltage of 18 kV across a 15 kÎ© resistance?**

- (A) 1.2
A

- (B) 12
A

- (C) 120 mA

- (D) 12 mA

**7. A resistance of 3.3 MÎ© is connected across a 500 V source. The resulting current is approximately**

- (A) 15.1 ÂµA

- (B) 151 ÂµA

- (C) 66 mA

- (D) 660 mA

**8. Approximately how many milli-amperes of current flow through a circuit with a 40 V source and 6.8 kÎ© of resistance?**

- (A) 27.2 mA

- (B) 59 mA

- (C) 5.9 mA

- (D) 590 mA

**9. If 750 ÂµA is flowing through 11 kÎ© of resistance, what is the voltage drop across the resistor?**

- (A) 8.25 V

- (B) 82.5
V

- (C) 14.6 V

- (D) 146 V

**10. When there is 12 mA of current through a 1.2 kÎ© resistor, the voltage across the resistor is**

- (A) 14.4
V

- (B) 1.4 V

- (C) 100 V

- (D) 10 V

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