A magnet made by using electric current is called _______
Thus a magnet made by using electric current is called electro magnet.
A branch of physics which studies the magnetic effects of electric current is called _________ .
The device used for producing electric current is called a
(a) generator
(b) galvanometer
(c) ammeter
(d) motor
Give scientific reasons.
(a) The copper wire used in an electro-magnet is insulated.
(b) In an electric bell, the electric current stops again and again.
(c) Electrical switches are made of plastic.
(d) The fuse wire is made of a good conductor.