Discussion
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- Question
Seven thousand volts can be expressed as
Options- A. 7 kV
- B. 7 MV
- C. 7 mV
- D. either 7 kV or 7 mV
- Correct Answer
- 7 kV
- 1. Ampere-turn is the unit of magnetomotive force (mmf).
Options- A. True
- B. False Discuss
- 2. Hysteresis is the number of lines of force per unit area in a magnetic field.
Options- A. True
- B. False Discuss
- 3. To understand how the output voltage is shaped by a differentiator, you must consider
Options- A. the response to the rising pulse edge
- B. the response between the rising and falling edges
- C. the response to the falling pulse edge
- D. all of the above Discuss
- 4. A 0.47 µF capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is
Options- A. 170 Ω
- B. 17 Ω
- C. 0.000169 Ω
- D. 1.7 Ω Discuss
- 5. Complex numbers can be added and subtracted but not multiplied or divided.
Options- A. True
- B. False Discuss
- 6. What is the voltage drop across R3?
Options- A. 112 mV
- B. 11.25 V
- C. 180 mV
- D. 1.80 V Discuss
- 7. The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 Ω load. The turns ratio is 3:1. What is the secondary voltage?
Options- A. 2 V
- B. 20 V
- C. 180 V
- D. 18 V Discuss
- 8. The winding resistance of a coil can be increased by
Options- A. increasing the number of turns
- B. using a thinner wire
- C. changing the core material
- D. increasing the number of turns or using thinner wire Discuss
- 9. If the rms current through a 4.7 kΩ resistor is 4 mA, the peak voltage drop across the resistor is
Options- A. 4 V
- B. 18.8 V
- C. 26.6 V
- D. 2.66 V Discuss
- 10. When a 1.6 kΩ resistor and a 120 Ω resistor are connected in parallel, the total resistance is
Options- A. greater than 1.6 kΩ
- B. greater than 120 Ω but less than 1.6 kΩ
- C. less than 120 Ω but greater than 100 Ω
- D. less than 100 Ω Discuss
More questions
Correct Answer: True
Correct Answer: False
Correct Answer: all of the above
Correct Answer: 170 Ω
Correct Answer: False
Correct Answer: 180 mV
Correct Answer: 20 V
Correct Answer: increasing the number of turns or using thinner wire
Correct Answer: 26.6 V
Correct Answer: less than 120 Ω but greater than 100 Ω
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