Moving Charges and Magnetic Effects Test - 3

cyclotron is used to

A proton is moving in a uniform magnetic field B in a circular path of radius 'a' in a direction perpendicular to z-axis along which the field B exists. Calculate the angular momentum if charge on the proton is 'e'.

An electron of mass m and charge q is travelling with a speed v along a circular path of radius r at a right angle to a uniform magnetic field of intensity B. If the speed of the electron is doubled and the intensity of magnetic field is halved, the resulting path would have a radius

An electron beam is moving between two parallel plates having an electric field 1.125 x 10^-6 N/m. A magnetic field 3 x 10^-10 T is also applied so that the beam does not deflect. The velocity of the electron is

A 600 mm long solenoid has 50 turns on it and is wound on an iron rod of 7.5 mm radius. Find the flux through the solenoid when the current in it is 3 A.
(Given: The relative permeability of iron is 600.)

When an electron moves in a magnetic field in a direction perpendicular to the field, then its path will be

Correct unit of magnetic field is

A beam of electrons passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off and the same magnetic field is maintained, the electrons move

Current i is carried in a wire of length L. If the wire is turned into a circular coil, the maximum magnitude of torque in a given magnetic field B will be