| 1 |
In LR circiut which one of the following statements is correct? |
- A. L and R opposes each other
- B. R value increases with frequency
- C. The inductive reactance increases with frequency
- D. The inductive reactance decreases with frequency
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| 2 |
The AC system is preferred to DC system because: |
- A. AC voltage can be easily changed in magnitude
- B. DC motor angular velocity is affected badly
- C. High voltage AC transmission is less efficient
- D. Domestic appliance require AC voltage for their operation
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| 3 |
In three phase A.C supply coils are inclined at an angle of. |
- A. 0<sup>o</sup>
- B. 90<sup>o</sup>
- C. 120<sup>o</sup>
- D. 80<sup>o</sup>
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| 4 |
A capacitor is perfectly insulator for: |
- A. Direct current
- B. Alternating current
- C. Direct as well as alternating current
- D. None of these
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| 5 |
At high frequency the value of reactance of capacitor will be. |
- A. Small
- B. Zero
- C. Large
- D. Infinite
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| 6 |
The peak value of alternating current is 5<b style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">√2 </b><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">A. The mean square value of current will be:</span> |
- A. 5A
- B. 2.5A
- C. 5<b style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">√2A</b>
- D. 5<sup>2</sup>
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| 7 |
The unit of impedance is |
- A. Farad
- B. Henry
- C. Tesla
- D. Ohm
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| 8 |
In Series resonance circuit the impedance of circuit art resonance frequency, is |
- A. Maximum
- B. Minimum
- C. It is unequal to R
- D. None of above
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| 9 |
The highest value reached by the voltage or current is one cycle is called: |
- A. Peak to peak value
- B. Peak value
- C. <div>Instantaneous value</div>
- D. Root mean square value
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| 10 |
In three phase A.C. generator the phase difference between each pair of coil is. |
- A. 45<sup>o</sup>
- B. 90<sup>o</sup>
- C. 120<sup>o</sup>
- D. 60<sup>o</sup>
|