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- Question
Three hundred joules of energy are consumed in 15 s. The power is
Options- A. 2,000 W
- B. 2 W
- C. 20 W
- D. 200 W
- Correct Answer
- 20 W
- 1. When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle
Options- A. increases
- B. decreases
- C. is not affected
- D. cannot be determined Discuss
- 2. A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is
Options- A. 2.43 µF
- B. 4.86 µF
- C. 100 µF
- D. 152 µF Discuss
- 3. A certain circuit is composed of two parallel resistors. The total resistance is 1,403 Ω. One of the resistors is 2 kΩ. The other resistor value is
Options- A. 1,403 Ω
- B. 4.7 kΩ
- C. 2 kΩ
- D. 3,403 Ω Discuss
- 4. Which of the following is not an electrical quantity?
Options- A. voltage
- B. current
- C. distance
- D. power Discuss
- 5. On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
Options- A. 1 V
- B. 50 V
- C. 500 V
- D. 1,000 V Discuss
- 6. The power rating of a resistor determines the minimum power that it can handle safely.
Options- A. True
- B. False Discuss
- 7. When a sine wave has a frequency of 100 Hz in 12 s it goes through
Options- A. 1/100 cycle
- B. 12 cycles
- C. 120 cycles
- D. 1,200 cycles Discuss
- 8. Using the mesh current method, find the branch current, IR1, in the above figure.
Options- A. 115 mA
- B. 12.5 mA
- C. 12.5 A
- D. 135 mA Discuss
- 9. A 47 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an ac source. What is the circuit impedance, Z?
Options- A. 129 Ω
- B. 12.9 Ω
- C. 167 Ω
- D. 73 Ω Discuss
- 10. A transformer
Options- A. changes ac to dc
- B. changes dc to ac
- C. steps up or down dc voltages
- D. steps up or down ac voltages Discuss
More questions
Correct Answer: increases
Correct Answer: 152 µF
Correct Answer: 4.7 kΩ
Correct Answer: distance
Correct Answer: 1,000 V
Correct Answer: False
Correct Answer: 1,200 cycles
Correct Answer: 115 mA
Correct Answer: 129 Ω
Correct Answer: steps up or down ac voltages
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