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- Question
Two inductors, L1 and L2, are in parallel. L1 has a value of 25 µH and L2 a value of 50 µH. The parallel combination is in series with L3, a 20 µH coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is
Options- A. 87 mA
- B. 870 mA
- C. 87 A
- D. 337 mA
- Correct Answer
- 870 mA
- 1. Generally, the mesh current method results in fewer equations than the node voltage method.
Options- A. True
- B. False Discuss
- 2. If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is
Options- A. 50 mA
- B. 70 mA
- C. 120 mA
- D. 40 mA Discuss
- 3. If you know the current anywhere in a series circuit, you know the current everywhere in a series circuit.
Options- A. True
- B. False Discuss
- 4. A wiper is the sliding contact in a
Options- A. switch
- B. photoconductive cell
- C. thermistor
- D. potentiometer Discuss
- 5. When an additional resistor is connected across an existing parallel circuit, the total resistance
Options- A. remains the same
- B. decreases by the value of the added resistor
- C. increases by the value of the added resistor
- D. decreases Discuss
- 6. A lower Q produces a narrower bandwidth.
Options- A. True
- B. False Discuss
- 7. Voltage leads current by 90° in a capacitor.
Options- A. True
- B. False Discuss
- 8. Voltage is measured in
Options- A. volts
- B. farads
- C. watts
- D. ohms Discuss
- 9. A 0.01 µF capacitor equals how many picofarads?
Options- A. 100 pF
- B. 1,000 pF
- C. 10,000 pF
- D. 100,000 pF Discuss
- 10. When the frequency of the voltage applied to a series RC circuit is increased, the phase angle
Options- A. increases
- B. decreases
- C. remains the same
- D. becomes erratic Discuss
More questions
Correct Answer: False
Correct Answer: 70 mA
Correct Answer: True
Correct Answer: potentiometer
Correct Answer: decreases
Correct Answer: False
Correct Answer: False
Correct Answer: volts
Correct Answer: 10,000 pF
Correct Answer: decreases
Comments
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