| 1 |
100 micro F capacitor is connects to an AC voltage 24 V and frequency 50 Hz. The reactance of the capacitor is. |
- A. 30.8 Ohm
- B. 31.8 Ohm
- C. 34.8 Ohm
- D. 40 Ohm
|
| 2 |
<span style="font-family: tahoma, Arial, Helvetica, sans-serif; font-size: 12px;">If V<sub>rms</sub> be the root mean square value of emf then its peak to peak value is given by</span> |
|
| 3 |
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
|
| 4 |
Main reason for world wide use of A.C. is |
- A. It is cheaper
- B. Transmitted
- C. Botha a and b
- D. Reaches in short time
|
| 5 |
The phase difference between current and voltage in an inductive circuit is. |
- A. zero
- B. 90 <sup>o</sup>
- C. 180 <sup>o</sup>
- D. 45<sup>o</sup>
|
| 6 |
Average value of current and voltage over a complete cycle is. |
- A. Positive
- B. Negative
- C. Zero
- D. Infinite
|
| 7 |
High frequency radio wave is called as |
- A. Fluctuate
- B. Carrier wave
- C. Matter wave
- D. Mechanical wave
|
| 8 |
The reactance of inductor depends upon |
- A. L
- B.
- C.
- D. All of the above
|
| 9 |
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>
|
| 10 |
Power dissipation in A.C circuit is expressed as: |
- A. P =I<sub>rms</sub> x V<sub>rms</sub> Sinθ
- B. IxVCosθ
- C. I<sub>rms</sub>xV<sub>rms</sub>Cosθ
- D. I<sub>rms</sub> x V<sub>rms</sub> Sin2θ
|