$A$ direct current of $10 \,A$ is superimposed on an alternating current $I = 40 \cos \omega t \; (A)$ flowing through a wire. The effective value of the resulting current will be ....... $A$.

In the circuit shown below,what will be the readings of the voltmeter and ammeter?

The $i - \nu$ curve for an anti-resonant circuit is:

The following figure shows an $AC$ generator connected to a 'black box' through a pair of terminals. The box contains possible $R, L, C$ or their combination,whose elements and arrangements are not known to us. Measurements outside the box reveal that $e = 75 \sin(\omega t) \text{ V}$ and $i = 1.5 \sin(\omega t + 45^\circ) \text{ A}$. Then,the wrong statement is:

The reactance of a circuit is zero. It is possible that the circuit contains:

Consider the infinite ladder circuit shown below. For which angular frequency $\omega$ will the circuit behave like a pure inductance?