Back to ALTERNATING CURRENT

NEET UG PHYSICS MCQ: ALTERNATING CURRENT

1 Medium

1 of 1

Application +4 | -1

The impedance of a circuit, when a resistance R and an inductor of inductance L are connected in series in an AC circuit of frequency

f

, is

View answer and explanation

Correct option: C

\sqrt {{R^2} + 4{\pi ^2}\;{f^2}\;{L^2}}

Option D (2ω) is correct because the instantaneous power is proportional to the square of the current or voltage, thus doubling the frequency.

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

V=I Z

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}

R