An $A.C.$ source is connected across a pure inductor. Which one of the following figures shows the correct phase relation between the current and $e.m.f.$?

The rms value of conduction current in a parallel plate capacitor is $6.9\,\mu A$. The capacity of this capacitor,if it is connected to a $230\,V$ $AC$ supply with an angular frequency of $600\,rad/s$,will be $....\,pF$.

$A$ resistor of resistance $100 \Omega$ is connected to an $AC$ source $\varepsilon = 10 \sin (250 \pi t)$. The energy dissipated as heat during $t = 0$ to $t = 1 \text{ ms}$ is approximately.

The reactance of a $25\,\mu F$ capacitor at the ac frequency of $4000\, Hz$ is

An inductor,a resistor,and a capacitor are joined in series with an $AC$ source. As the frequency of the source is slightly increased from a very low value,the reactance of the

An alternating voltage source $V = 260 \sin(628t)$ is connected across a pure inductor of $5\,mH$. Inductive reactance in the circuit is $......... \Omega$.