A laser beam has intensity `2.5` x `(10^14)W (m^-2)`. Find the amplitudes of electric and magnetic fields in the beam.

A proton goes undeflected in a crossed electric and magnetic field (the fields are perpendicular to each other) at a speed of 2.0X10^5 ms^(-1). The velocity is perpendicular to both the fields. When the electric field is switched off, the proton moves along a circle of radius 4.0 cm. Find the magnitudes of the electric and the magnetic fields. take the mass of the proton =1.6 X10^(-27) kg.

A light beam travelling in the x- direction is described by the electric field E_y=(300V (m^-1) sin omega (t-(x//c)) . An electron is constrained to move along the y-direction with a speed (2.0 xx (10^7) m (s^-1)) . Find the maximum electric force and the maximum magnetic force on the electron.

A beam of helium atoms moves with a velocity of 2.0 xx 10^3 ms^(-1) . Find the wavelength of the particles constituting the beam. (h = 6.626 xx 10^(-34)Js) .

Compute the speed of the electromagnetic wave in a medium if the amplitude of electric and magnetic fields are 3 xx 10^(4) N C^(-1) and 2 xx 10^(-4)T, respectively.

The earth's magnetic field at a given point is 0.5 xx 10^(-5) Wb m^(2) . This field is to be annulled by magnetic induction at the center of circular conducing loop of radius 5 . The current required to be flown in the loop is nearly

A plane electromagnetic wave propagating in the x-direction has a wavelength of 5.0 mm. The electric field is in the y-direction and its maximum magnitude is 30V (m^-1) . Write suitable equations for the electric and magnetic fields as a function of x and t.