3.
The magnetic effect of electric current was discovered by
4.
Which of the following figures represents the magnetic lines of force due to an isolated north pole?
5.
A coil carrying current behaves as a/an
6.
An electric current predominantly produces overline field around it.
7.
A carbon microphone is best used in a
8.
Which of the following figures represent the magnetic lines of force due to an isolated south pole
10.
Electromagnets are used in
