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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. A three-phase generator is connected to three 90 Ω load resistors. Each coil generates 120 V ac. A common neutral line exists. How much current flows through the common neutral line?
Options- A. 0 A
- B. 1.33 A
- C. 3.99 A
- D. 2.66 A Discuss
- 2. A balanced Wheatstone bridge consists of an RV of 3,500 Ω, an R2 of 200 Ω, and an R3 of 680 Ω. The value of RUNK is
Options- A. 680 Ω
- B. 1,029 Ω
- C. 200 Ω
- D. 880 Ω Discuss
- 3. Electromagnetic induction is the force that produces a magnetic field.
Options- A. True
- B. False Discuss
- 4. How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?
Options- A. 9 V
- B. 90 V
- C. 900 V
- D. 0.9 V Discuss
- 5. In the complex plane, the number 4 + j3 is located in the
Options- A. first quadrant
- B. second quadrant
- C. third quadrant
- D. fourth quadrant Discuss
- 6. The higher the range setting, the less the internal resistance and the greater the load effect of the voltmeter on a circuit.
Options- A. True
- B. False Discuss
- 7. A certain voltage divider consists of two 12 kΩ resistors in series. Which of the following load resistors will have the most effect on the output voltage?
Options- A. 1 MΩ
- B. 24 kΩ
- C. 18 kΩ
- D. 12 kΩ Discuss
- 8. In a series RLC circuit, the larger reactance determines the net reactance of the circuit.
Options- A. True
- B. False Discuss
- 9. Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals?
Options- A. 219 kΩ
- B. 66 kΩ
- C. 660 kΩ
- D. 1.3 MΩ Discuss
- 10. When one of three series resistors is removed from a circuit and the circuit is reconnected, the current
Options- A. increases
- B. increases by one-third
- C. decreases by one-third
- D. decreases by the amount of current through the removed resistor Discuss
More questions
Correct Answer: 0 A
Correct Answer: 1,029 Ω
Correct Answer: False
Correct Answer: 90 V
Explanation:
We know that, V2/V1 = N2/N1.
Given V2 = 9v, N2/N1 = 0.1
Therefore, 9v/V1 = 0.1
V1 = 9v/0.1 = 90v.
Given V2 = 9v, N2/N1 = 0.1
Therefore, 9v/V1 = 0.1
V1 = 9v/0.1 = 90v.
For more detail: Step Down Transformer - Circuit with Simulation.
Correct Answer: first quadrant
Correct Answer: False
Correct Answer: 12 kΩ
Correct Answer: True
Correct Answer: 660 kΩ
Correct Answer: increases
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