In a circuit,the current lags behind the voltage by a phase difference of $\pi / 2$. The circuit contains which of the following?

$A$ piece of semiconductor is connected in series in an electric circuit. On increasing the temperature,the current in the circuit will

The solution of $x \frac{dy}{dx} = y + x e^{y/x}$ with $y(1) = 0$ is

How are the following compounds related?

For the reaction $A + 2B \rightleftharpoons 2C + D$,the initial concentration of $A$ is $a$ and the initial concentration of $B$ is $1.5$ times that of $A$. If the concentrations of $A$ and $D$ are equal at equilibrium,what will be the concentration of $B$ at equilibrium?

An electron is projected along the axis of a circular conductor carrying current $I$. The electron will experience: