Discussion
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- Question
The opposition to ac by an inductor is directly proportional to ___.
Options- A. resistance
- B. reactance
- C. frequency
- D. voltage
- Correct Answer
- frequency
- 1. Pico is what relation to micro?
Options- A. one-tenth
- B. one-hundredth
- C. one-thousandth
- D. one-millionth Discuss
- 2. In a purely capacitive circuit,
Options- A. current leads voltage by 90°
- B. voltage leads current by 90°
- C. current lags voltage by 90°
- D. current and voltage have a phase relationship of 0° Discuss
- 3. When a full band of frequencies is allowed to pass through a filter circuit to the output, the resonant circuit is called a:
Options- A. low-pass filter
- B. high-pass filter
- C. band-stop filter
- D. bandpass filter Discuss
- 4. What is the impedance of the circuit?
Options- A. 12.2 kΩ
- B. 14.5 kΩ
- C. 17.8 kΩ
- D. 20.3 kΩ Discuss
- 5. Power supplies differ from batteries in that
Options- A. power supply output voltages are ac and not dc
- B. power supply voltages are not stable
- C. power supplies are low-current devices
- D. None of the above Discuss
- 6. What are the individual values of two parallel resistors whose RT is 8 ohms, when one has double the resistance of the other?
Options- A. 2.7 ohms and 5.3 ohms
- B. 8 ohms and 16 ohms
- C. 10 ohms and 20 ohms
- D. 12 ohms and 24 ohms Discuss
- 7. What is the difference between common-mode and differential-mode input signals?
Options- A. phase relationship
- B. voltage
- C. current
- D. apparent power Discuss
- 8. If doubling the voltage across a resistor doubles the current through the resistor then
Options- A. the resistor value decreased
- B. the resistor value did not change
- C. the resistor value increased
- D. it is impossible to determine the change in the resistor value Discuss
- 9. What is the total resistance of a circuit when R1 (7 k Ω) is in series with a parallel combination of R2 (20 k Ω), R3 (36 k Ω), and R4 (45 k Ω)?
Options- A. 4 k Ω
- B. 17 k Ω
- C. 41 k Ω
- D. 108 k Ω Discuss
- 10. Which coil would be used as a step-up transformer primary if coil number 1 has 100 more turns than coil number 2?
Options- A. The coil windings must be the same.
- B. coil 1
- C. The coil ratio is too small.
- D. coil 2 Discuss
More questions
Correct Answer: one-millionth
Correct Answer: current leads voltage by 90°
Correct Answer: bandpass filter
Correct Answer: 20.3 kΩ
Correct Answer: None of the above
Correct Answer: 12 ohms and 24 ohms
Correct Answer: phase relationship
Correct Answer: the resistor value did not change
Correct Answer: 17 k Ω
Correct Answer: coil 2
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