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- Question
In a Y-Y source/load configuration, the
Options- A. phase current, the line current, and the load current are all equal in each phase
- B. phase current, the line current, and the load current are 120° out of phase
- C. phase current and the line current are in phase, and both are 120° out of phase with the load current
- D. line current and the load current are in phase, and both are out of phase with the phase current
- Correct Answer
- phase current, the line current, and the load current are all equal in each phase
- 1. Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is
Options- A. 60 mA
- B. 15 mA
- C. 135 mA
- D. 31.25 mA Discuss
- 2. Five resistors are connected in a series and there is a current of 3 A into the first resistor. The amount of current into the second resistor is
Options- A. 3 A
- B. 1 A
- C. 4 A
- D. 0.3 A Discuss
- 3. The total current divides among parallel resistors in a manner directly proportional to the resistance values.
Options- A. True
- B. False Discuss
- 4. The superposition theorem is useful for circuit analysis only in ac circuits.
Options- A. True
- B. False Discuss
- 5. In a balanced three-phase load, each phase has
Options- A. an equal amount of power
- B. one-third of total power
- C. two-thirds of total power
- D. a power consumption equal to
IL
Discuss
- 6. A capacitor with 150 Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is
Options- A. Z = 150
- B. Z = 150∠90°Ω
- C. Z = 150 ∠?90°Ω
- D. Z = 150∠180°Ω Discuss
- 7. In assigning the direction of branch currents,
Options- A. the directions are critical
- B. the directions are not critical
- C. they must point into a node
- D. they must point out of a node Discuss
- 8. A square wave has a period of 60 µs. The first odd harmonic is
Options- A. 5 kHz
- B. 50 kHz
- C. 500 kHz
- D. 33.33 kHz Discuss
- 9. A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 kΩ. Current flow in the circuit is
Options- A. 9.2 mA
- B. 92 mA
- C. 4.6 mA
- D. 460 mA Discuss
- 10. Four amperes of current are measured through a 24 Ω resistor connected across a voltage source. How much voltage does the source produce?
Options- A. 960 V
- B. 9.6 V
- C. 96 V
- D. 8 V Discuss
More questions
Correct Answer: 31.25 mA
Correct Answer: 3 A
Correct Answer: False
Correct Answer: False
Correct Answer: an equal amount of power
Correct Answer: Z = 150 ∠?90°Ω
Correct Answer: the directions are not critical
Correct Answer: 50 kHz
Correct Answer: 4.6 mA
Correct Answer: 96 V
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