List of top Physics Questions on LCR Circuit asked in KEAM

For a given ac supply voltage $60\sin\omega t$, the reactances offered by $L$ and $C$ are found to be $20,\Omega$ each. If the resistance of the resistor is also $20,\Omega$, then the current in the circuit is

The r.m.s current of an alternating current given by $i = 4\sqrt{2}\sin \omega t + 3\sqrt{2}\cos \omega t$ is:

In ac circuit containing an ac source of frequency f, the capacitance is proportional to

The rms value of a.c with peak value of \(200\) V is

An alternating current having the peak value \( 10\sqrt{2}\,\text{A} \) is used to heat a metal wire. To produce the same heating effect, the constant current required is

The a.c circuit exhibiting the phenomenon of resonance has/have the circuit element(s)

Choose the wrong statement for the pure inductive circuit.

A pure inductor of inductance 0.1 H is connected to an AC source (of rms voltage) 220 V and angular frequency of 300 Hz. The rms current is

In an LCR series circuit (of inductance L, capacitance C and resistance R), the impedance is minimum when the angular frequency of the source is given by

The self inductance of a long solenoid carrying current is independent of

The r.m.s. value of A.C. which when passed through a resistor produces heat, which is twice that produced by a steady current of $1.414$ A in the same resistor is

In a series LCR AC circuit, the current is maximum when the impedance is equal to

A lamp consumes only 25% of the peak power in an AC circuit. The phase difference between the applied voltage and the current is

In an LCR series circuit, at resonance

In an LCR series circuit, at resonance

In an LCR series circuit, at resonance