| 1 |
The highest value reached by the voltage or current in one cycle is called. |
- A. Peak ot peak value
- B. Peak value
- C. Instantaneous value
- D. Root mean square value
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| 2 |
If I<sub>o</sub> is the peak value of current, then its root mean square value is given by |
- A.
- B. 2 I<sub>o</sub>
- C. I<sub>o</sub>
- D. 0.7 I<sub>o</sub>
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| 3 |
The natural frequency of L.C circuit is equal to |
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| 4 |
The flow of D.C current is opposed by |
- A. Resistor
- B. Induction
- C. Capacitor
- D. All of these
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| 5 |
In modulation, low frequency signal is known as |
- A. Carrier wave
- B. fluctuated signal
- C. Modulated carrier signal
- D. Modulation signal
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| 6 |
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>
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| 7 |
An electromagnetic wave goes from air to glass which of the following does not change? |
- A. Radio waves
- B. X-rays
- C. Ultra violet radiation
- D. Ultra sond waves
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| 8 |
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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| 9 |
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
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| 10 |
In three phase voltage across any two lines is about. |
- A. 220 V
- B. 230 V
- C. 400 V
- D. 430 V
|