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- Question
A 12 kHz voltage is applied to a 0.33 µF capacitor, and 200 mA of rms current is measured. What is the value of the voltage?
Options- A. 8 V
- B. 80 V
- C. 80 mV
- D. 800 mV
- Correct Answer
- 8 V
- 1. The current in a given circuit is not to exceed 24 A. Which value of fuse is best?
Options- A. a fuse is not necessary
- B. 10 A
- C. 24 A
- D. 20 A Discuss
- 2. A 120 Ω resistor is in parallel with a capacitor with a capacitive reactance of 40 Ω. Both components are across a 12 V ac source. What is the magnitude of the total impedance?
Options- A. 37.9 Ω
- B. 3.7 Ω
- C. 14,400 Ω
- D. 4,800 Ω Discuss
- 3. A 12 mA current source has an internal resistance, RS, of 1.2 kΩ. The equivalent voltage source is
Options- A. 144 V
- B. 14.4 V
- C. 7.2 V
- D. 72 mV Discuss
- 4. Total power in a parallel circuit is found by adding up the power of all the individual resistors.
Options- A. True
- B. False Discuss
- 5. Referring to Problem 23, what will the output voltage be if the coil's internal resistance is neglected?
Options- A. 0 V
- B. 200 mV
- C. 11.1 mV
- D. 111 mV Discuss
- 6. When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
Options- A. increases
- B. decreases
- C. remains the same
- D. doubles Discuss
- 7. When a load resistance is removed from the output of a voltage divider circuit, the current drawn from the source
Options- A. decreases
- B. increases
- C. remains the same
- D. is cut off Discuss
- 8. Using the current-divider formula, you can find the current in any branch of a series-parallel circuit.
Options- A. True
- B. False Discuss
- 9. In a Y-connected source feeding a △-connected load,
Options- A. each phase of the load has one-third of the full line voltage across it
- B. each phase of the load has two-thirds of the full line voltage across it
- C. each phase of the load has the full line voltage across it
- D. each phase of the load has a voltage across it equal to
Discuss
- 10. The direction of a magnetic field within a magnet is
Options- A. from south to north
- B. from north to south
- C. back to front
- D. front to back Discuss
More questions
Correct Answer: 24 A
Correct Answer: 37.9 Ω
Correct Answer: 14.4 V
Correct Answer: True
Correct Answer: 0 V
Correct Answer: decreases
Correct Answer: decreases
Correct Answer: True
Correct Answer: each phase of the load has the full line voltage across it
Correct Answer: from south to north
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