Electromagnetic waves travel in a medium which has relative permeability $1.3$ and relative permittivity $2.14.$ Then the speed of the electromagnetic wave in the medium will be

The relative permeability of glass is $3/8$ and the dielectric constant of glass is $8.$ The refractive index of glass is

A parallel plate capacitor with plates separated by air acquires $1\mu C$ of charge when connected to a battery of $500V.$ The plates still connected to the battery are then immersed in benzene $\left[k=2.28\right].$ Then a charge that flows from the battery is.

Energy released in the fission of a single ${.}_{92}{U}^{235}$ nucleus is $200MeV.$ The fission rate of a ${.}_{92}{U}^{235}$ fuelled reactor operating at a power level of $5W$ is.

The ratio between total acceleration of the electron in singly ionized helium atom and hydrogen atom (both in ground state) is

A current of $1/\left(4\pi \right)$ ampere is flowing in a long straight conductor. The line integral of magnetic induction around a closed path enclosing the current carrying conductor is

A wave is represented as $e=10\sin \left({10}^{8}t+6\sin 1250t\right)$
then the modulating index is

If the wavelength of the first line of the Balmer series of hydrogen is $6561\mathring{A}$, the wavelngth of the second line of the series should be

A bar magnet of moment of inertia $1\times {10}^{-2}kg{m}^2$ vibrates in a magnetic field of induction $0.36\times {10}^{-4}$ tesla. The time period of vibration is $10s.$ Then the magnetic moment of the bar magnet is $\left(A{m}^2\right)$

A bar magnet suspended in magnetic meridian executes oscillations with a time period of $2$ sec in the earth's horizontal magnetic field of $24$ microtesla. When a horizontal field of $18$ microtesla is produced opposite to the earth's field by placing a current carrying wire, the new time period of magnet will be: