Charges & Magne...

Ratio of magnetic force F_m and electric force F_e acting on a charge getting undeflected through the field is

Time taken by an ion to describe a semicircular path, in a cyclotron

If a charged particle goes undeflected in a region containing electric and magnetic fields. Select all of the following statements that must be true for this.

1. must be perpendicular to
2. must be perpendicular to
3.  must be perpendicular to 
4.  E must be equal to vB​

The dipole moment of a current loop is independent of:

If cathode rays are projected at right angles to a magnetic field, their trajectory is