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- Question
When testing an n-channel D-MOSFET, resistance G to D = ∞, resistance G to S = ∞, resistance D to SS = ∞ and 500 Ω, depending on the polarity of the ohmmeter, and resistance D to S = 500 Ω. What is wrong?
Options- A. short D to S
- B. open G to D
- C. open D to SS
- D. nothing
- Correct Answer
- nothing
- 1. What is the percent of regulation if Vnl = 20 V and Vfl = 19.8 V?
Options- A. 0%
- B. 1%
- C. .1%
- D. 5% Discuss
- 2. The impedance is 1177 Ω.
Options- A. True
- B. False Discuss
- 3. What is the total inductance, assuming no mutual inductance?
Options- A. 12 mH
- B. 6 mH
- C. 0.73 mH
- D. 0 mH Discuss
- 4. A voltage is induced in a transformer secondary winding by the action of the:
Options- A. secondary magnetic field
- B. primary turns ratio
- C. primary magnetic field
- D. secondary counter emf Discuss
- 5. Current will cause a magnetic field in a conductor as follows:
Options- A. An ac current causes a fixed polarity magnetic field.
- B. A dc current causes a fixed polarity magnetic field.
- C. A dc current causes an alternating magnetic field.
- D. An ac current causes a fixed polarity magnetic field and a dc current causes an alternating magnetic field. Discuss
- 6. If you wanted to decrease the inductance of a coil, you might increase the:
Options- A. number of turns
- B. permeability of the core
- C. spacing between turns
- D. area of the coil Discuss
- 7. A 24 V peak source is connected across a 900 µH inductor. If the frequency of the source is 22 kHz, what is the reactive power?
Options- A. 2.3 VAR
- B. 4.6 VAR
- C. 9.3 VAR
- D. 0 VAR Discuss
- 8. An inductor is in series with a voltage source, an open switch, and a resistor. The instant the switch is closed, the inductor acts like
Options- A. a short
- B. an open
- C. a resistor
- D. a voltage source Discuss
- 9. A henry value divided by a circuit resistive value provides the:
Options- A. counter emf value
- B. induced voltage amplitude
- C. rise or decay time constant
- D. quality factor of the coil Discuss
- 10. You could decrease the time constant of an RL circuit by
Options- A. adding a resistor in parallel with the circuit resistance
- B. adding an inductor in series with the circuit inductance
- C. decreasing the amplitude of the input voltage
- D. exchanging the position of the resistor and inductor in the circuit Discuss
More questions
Correct Answer: 1%
Correct Answer: True
Correct Answer: 12 mH
Correct Answer: primary magnetic field
Correct Answer: A dc current causes a fixed polarity magnetic field.
Correct Answer: spacing between turns
Correct Answer: 2.3 VAR
Correct Answer: an open
Correct Answer: induced voltage amplitude
Correct Answer: adding an inductor in series with the circuit inductance
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