Discussion
Home ‣ Electrical Engineering ‣ Voltage, Current and Resistance See What Others Are Saying!
- Question
A wiper is the sliding contact in a
Options- A. switch
- B. photoconductive cell
- C. thermistor
- D. potentiometer
- Correct Answer
- potentiometer
- 1. If the resistance in parallel with a parallel resonant circuit is reduced, the bandwidth
Options- A. disappears
- B. becomes sharper
- C. increases
- D. decreases Discuss
- 2. A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is
Options- A. 1.7 V
- B. 0.85 V
- C. 1 V
- D. 0 V Discuss
- 3. The maximum resistance value for a brown, red, yellow, gold resistor is
Options- A. 126,000 Ω
- B. 126,600 Ω
- C. 114,000 Ω
- D. 132,000 Ω Discuss
- 4. A 220 Ω resistor dissipates 3 W. The voltage is
Options- A. 73.3 V
- B. 2.5 V
- C. 25.7 V
- D. 257 V Discuss
- 5. The joule is a unit of energy.
Options- A. True
- B. False Discuss
- 6. Four 0.15 µF capacitors are in parallel. The total capacitance is
Options- A. 0.15 µF
- B. 0.30 µF
- C. 0.6 µF
- D. 0.8 µF Discuss
- 7. Energy is stored by an inductor in an electrostatic field.
Options- A. True
- B. False Discuss
- 8. 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?
Options- A. 33 Ω
- B. 330 Ω
- C. both resistors
- D. neither resistor Discuss
- 9. In a lag network, the output voltage lags the input voltage in phase.
Options- A. True
- B. False Discuss
- 10. In an RC differentiator, the sum of the capacitor voltage and the resistor voltage at any instant
Options- A. must be zero
- B. must be equal to the applied voltage
- C. is less than the applied voltage but greater than zero
- D. cannot be determined Discuss
More questions
Correct Answer: decreases
Correct Answer: 1.7 V
Correct Answer: 126,000 Ω
Correct Answer: 25.7 V
Correct Answer: True
Correct Answer: 0.6 µF
Correct Answer: False
Correct Answer: neither resistor
Correct Answer: True
Correct Answer: must be equal to the applied voltage
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