A voltage $v=v_0 \sin \omega t$ applied to a circuit drives a current $i=i_0 \sin (\omega t+\phi)$ in the circuit. The average power consumed in the circuit over a cycle is

The given diagram exhibits the relationship between the wavelength of the electromagnetic waves and the energy of photon associated with them. The three points $\mathbf{P}, \mathbf{Q}$ and $\mathbf{R}$ marked on the diagram may correspond respectively to

A beaker is filled with water (refractive index $\frac{4}{3}$ ) up to a height $H$. A coin is placed at its bottom. The depth of the coin, when viewed along the near ${ }^n$ ormal direction, will be

The stopping potential $V_0$ measured in a photoelectric experiment for a metal surface is plotted against frequency $v$ of the incident radiation. Let $m$ be the slope of the straight line so obtained. Then the value of charge of an electron is given by ( $h$ is the Planck's constant)