2.
An electron enters a uniform magnetic field with speed v. It describes a semicircular path and comes out of the field. The final speed of the electron is-
4.
The ratio of the magnitude of magnetic moment to that of angular momentum, of an electron revolving around the nucleus in a hydrogen atom is-
6.
Two wires of same length are shaped into a square and a circle. If they carries the same current, the ratio of their magnetic moments will be-
7.
Beams of electrons and protons move parallel to each other in the same direction.
8.
Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The current flowing in them are I and 2I respectively. The resultant magnetic field induction at the center will be-
9.
To convert a moving coil galvanometer into an ammeter of a given range, we must connect-
10.
A current carrying loop placed in a uniform magnetic field experience-
