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 Ω 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
kΩ
- (B) 820 Ω
- (C) 8.2 Ω
- (D) 82 Ω
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 Ω
- (B) 400 Ω
- (C) 4 kΩ
- (D) 4.4 Ω
6. How much current is produced by a voltage of 18 kV across a 15 kΩ resistance?
- (A) 1.2
A
- (B) 12
A
- (C) 120 mA
- (D) 12 mA
7. A resistance of 3.3 MΩ is connected across a 500 V source. The resulting current is approximately
- (A) 15.1 µA
- (B) 151 µA
- (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 kΩ of resistance?
- (A) 27.2 mA
- (B) 59 mA
- (C) 5.9 mA
- (D) 590 mA
9. If 750 µA is flowing through 11 kΩ 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 kΩ 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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