| 1 |
The main use of A.C is |
- A. Minimum line losses
- B. Long distance transmission
- C. Stepping up to required voltage only
- D. Steeping down to required voltage only
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| 2 |
In a pure inductive A.C. circuit the current. |
- A. Lags behind voltage by 90 <sup>o</sup>
- B. Leads the voltage by 90 <sup>o</sup>
- C. In phase with voltage
- D. Leads the voltage by 270 <sup>o</sup>
|
| 3 |
Average value of current and voltage over a complete cycle is. |
- A. Positive
- B. Negative
- C. Zero
- D. Infinite
|
| 4 |
In chopke coil the resistance X<sub>L</sub> an resistance R are: |
- A. X<sub>L</sub>=R
- B. X<sub>L</sub><<R
- C. X<sub>L</sub>>>R
- D. X<sub>L</sub>=<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">∞</span>
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| 5 |
The phase angle of a series RLC circult at resonant frequency is |
- A. 1/2
- B. sigma
- C. Zero
- D. sigma /4
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| 6 |
In the capacitive circuit of A.C. quantity when q= 0 the slope of q-t curve is. |
- A. Maximum
- B. Minimum
- C. Zero
- D. Negative
|
| 7 |
The effective value of any sinusoidal alternating current or voltage is |
- A.
- B.
- C.
- D. None of the above
|
| 8 |
In RLC circuit the energy is dissipated in |
- A. R only
- B. R and L
- C. R and C
- D. L and C
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| 9 |
The expression P = VI hold only when current and voltage are. |
- A. In phase
- B. Out of phase
- C. At right angle to each other
- D. At angle of 120 <sup>o</sup>
|
| 10 |
<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> |
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