1.
Alternating current is the current which
2.
The SI unit of frequency is
3.
The time period of an AC source having frequency 50 Hz is
4.
The angular frequency of a 50 Hz AC supply is approximately
5.
The rms value of alternating current is
6.
The peak value of AC is 20 A. Its rms value is
7.
The average value of a sinusoidal AC over one complete cycle is
8.
The average value of AC over one half cycle is
9.
An AC voltmeter measures
10.
The domestic AC supply in India has frequency
11.
For a sinusoidal AC wave, the current becomes zero
12.
The phase difference between voltage and current in a pure resistor is
13.
In a purely inductive circuit, current lags behind voltage by
14.
In a purely capacitive circuit, current leads voltage by
15.
The power consumed in a pure inductor is
16.
Assertion (A): The average power consumed in a pure capacitor is zero. Reason (R): Current leads voltage by 90°.
17.
Assertion (A): RMS value is used for measuring AC. Reason (R): It produces the same heating effect as DC.
18.
Match the Columns: Column–I P. Pure Resistor Q. Pure Inductor R. Pure Capacitor S. RMS Current Column–II 1. I₀/√2 2. Current leads voltage 3. Current lags voltage 4. Phase difference = 0° Choose the correct matching.
19.
The crest factor for a sinusoidal AC is
20.
The form factor of a sinusoidal AC is
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