In an electric circuit, a capacitor of reactance $55 \Omega$ is connected across the source of 220 V . The value of displacement current is
The work done in moving a charge particle of charge $2 \times 10^{-8} \mathrm{C}$ between two points having potential difference of 36 V is
A light ray of wavelength 546 nm is incident on an air-glass interface. If the speed of light in air is $3 \times 10^8 \mathrm{~m} / \mathrm{s}$. Then, wavelength of light ray in glass will be
[Take, refractive index of glass, $\mu=1.5$ ]
A solenoid of length 0.4 m and having 500 turns of wire carries a current of 3 A . A thin coil having 10 , turns of wire and of radius 0.01 m carries a current of 0.4 A . The torque required to hold the coil in the middle of the solenoid with its axis perpendicular to the axis of solenoid.