In S.I, the absolute permitivity of free space `mu=4pixx10^-7 TA^-1m`. (True/ false)

The area of B - H loop for a ferromagnetic material is 540 J m^-3 . If the absolute permeability of free space is 4pi xx 10^-7 J A^-2 m^-1 , find the area of the I - H loop of the ferrogmangnetic material.

If absolute permittivity and permeability of free space are epsilon_0 = 8*85 xx 10^(-12) C^2 N^(-1) m^(-2) and mu_0 = 4 pi xx 10^(-7) N s^2 C^(-2) .Caculate the velocity of electromagnetic waves?

Thermal velocities of free electrons are of the order of 10^5 ms^-1 . (True/ false)

Thermal velocities of free electrons are of the order of 10^5 ms^-1 . (True/ false)

A 0.5m long solenoid has 500 turns and has a flux density of 2.52 xx10^(-3) T at its centre. Find the current in the solenoid. (Given mu= 4pixx10^(-7)TA^(-1)m ).

The velocity of electromagnetic waves in free space is 3 xx 10^8 m s^(-1) .The frequency of a radio wave of wave length 150 m is

An electron is moving with speed 10*6 ms-1 parallel to a current of 5A flowing through an infinitely long straight wire separated by a perpendicular distance of 10 cm in air. Calculate the magnitude of the force experienced by the electron. Given (mu_0=4pixx10^(-7)TmA^(-1))

A long horizontal rigidly supported wire carries a current i_a of 100 A. Directly above it and parallel to its is a fine wire that carries a current i_b of 20 A and weighs 0.073 N/m. How far above the lower wire should the second wire be kept if we wish to support it by magnetic repulsion? Given permeability constant mu_0= 4pi xx 10^-7 Wb A^-1m^-1 .

Find the wavelengthof electromagnetic waves of frequencies 4 xx 10 ^17 Hz in free space. Write its two applications.