1.
A carbon microphone is best used in a
3.
A coil carrying current behaves as a/an
4.
Which of the following figures represents the magnetic lines of force due to an isolated north pole?
6.
Electromagnets are used in
7.
An electric current predominantly produces overline field around it.
8.
Which of the following figures represent the magnetic lines of force due to an isolated south pole
10.
The magnetic effect of electric current was discovered by
