| 1 |
Vrms = |
- A. 0.7V<sub>∘</sub>
- B. <div>0.07V<sub>∘</sub></div>
- C. 0.007V<sub>∘</sub>
- D. 0.75V<sub>∘</sub>
|
| 2 |
A capacitor is perfectly insulator for: |
- A. Direct current
- B. Alternating current
- C. Direct as well as alternating current
- D. None of these
|
| 3 |
The flow of D.C current is opposed by |
- A. Resistor
- B. Induction
- C. Capacitor
- D. All of these
|
| 4 |
The value of capacitive reactance is given by |
- A. Xc = VI
- B. xc= 1/wc or xc= wL
- C. xc= 1*wc or xc=Lw
- D. All of above
|
| 5 |
In frequency modulation, the amplitude of carrier waves is |
- A. Increases
- B. Remains constant
- C. Decreases
- D. None of these
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| 6 |
The device which allows only the continuous flow of AC through it is. |
- A. Inductor
- B. Battery
- C. Thermistor
- D. Capacitor
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| 7 |
Unit of impedance is: |
- A. Ohm
- B. Ohm<sup>-1</sup>
- C. no unit
- D. Ohm m<sup>-1</sup>
|
| 8 |
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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| 9 |
At high frequency, the current through a capacitor is |
- A. Small
- B. Infinity
- C. Zero
- D. Large
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| 10 |
An A.C. voltmeter reads 220 V, its peak value will be |
- A. 225 V
- B. 240 V
- C. 311.12 V
- D. 300 V
|