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The main reason for world wide use of A.C is because:
It is very high power
It can be transmitted over long distance
It is cheaper to use
ALl of above
In an LRC circiut, the capacitance is made one-fourth, when an resonance . Then what should be change in inductance, so that the circuit remain in resonance?
In purely resistive A.C circuit, instantaneous value of voltage and current:
Current leads voltage by ?/2
Current lags behind voltage
Both are in Phase
Voltage leads current by Pase ?=?/2
Unit of impedance is:
The phase difference between the current and voltage at resonce is:
In case of capacitor, the unit of reactance is
All of these
The electromagnetic spectrum contains
All of these
The combined effect of resistance and reactance in circuit is called:
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