Name the device which converts mechanical energy into electric energy.

What is the force on a current-carrying wire that is parallel to a magnetic field? Give reason for your answer.

A charged particle enters at right angles into a uniform magnetic field as shown:

What should be the nature of charge on the particle if it begins to move in a direction pointing vertically out of the page due to its interaction with the magnetic field?

Out of an A.C. generator and a D.C. generator:

(a) which one uses a commutator (split rings)?

(b) which one uses slip rings?

Name the phenomenon which is made use of in an electric generator.