Practice Test: Question Set - 02
1. A half-watt is equal to how many milliwatts?
- (A) 5,000 mW
- (B) 5 mW
- (C) 500 mW
- (D) 50 mW
2. A 75 Ω load uses 2 W of power. The output voltage of the power supply is approximately
- (A) 120 V
- (B) 1.2 V
- (C) 12 V
- (D) 6 V
3. A resistor normally opens when it burns out.
- (A) True
- (B) False
4. The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be
- (A) 2 W
- (B) 1 W
- (C) 5 W
- (D) 0.5
W
5. The capacity of a battery is measured in milli-amperes.
- (A) True
- (B) False
6. A 33 Ω half-watt resistor and a 330 Ω half-watt resistor are connected across a 12 V source. Which one(s) will overheat?
- (A) 33 Ω
- (B) 330 Ω
- (C) Both
resistors
- (D) Neither
resistor
7. A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is
- (A) 0.58 Ah
- (B) 2.1 Ah
- (C) 21 Ah
- (D) 58 Ah
8. A battery is one type of power supply that converts chemical energy into electrical energy.
- (A) True
- (B) False
9. If it takes 400 ms to use 12,000 J of energy, the power is
- (A) 30 kW
- (B) 30 W
- (C) 3 W
- (D) 300 kW
10. Three hundred joules of energy are consumed in 15 s. The power is
- (A) 2,000 W
- (B) 2 W
- (C) 20 W
- (D) 200 W
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