NEET UG PHYSICS MCQ: ALTERNATING CURRENT

1 Medium

1 of 1

Understanding +4 | -1

A resistor R, an inductor L and a capacitor C are connected in series to an oscillator of frequency

n

, if the resonant frequency is

{n_r}

, then the current lags behind voltage, when

View answer and explanation

Correct option: D

n > {n_r}

Option D (

n > {n_r}

) is correct because when the frequency is greater than the resonant frequency, the inductive reactance dominates, causing the current to lag behind the voltage.

More Questions from ALTERNATING CURRENT

Practice All Chapter MCQs →

Assertion (A) : In an

\mathrm{AC}

circuit, potential difference across the capacitor may be greater than the applied voltage.

Reason (R) :

V_C=I X_C

, whereas

V=I Z

and

X_C

can be greater than

Z

also. When power is drawn from the secondary coil of the transformer, the dynamic resistance An alternating e.m.f. is applied to purely capacitive circuit. The phase relation between e.m.f. and current flowing in the circuit is or
In a circuit containing capacitance only
Average power in the L-C-R circuit depends upon A generator produces a voltage that is given by

V = 240\sin 120\;t

, where t is in seconds. The frequency and r.m.s. voltage are In a choke coil, the resistance

{X_L}

and resistance

R

are such that