Question

Explanation of acitivity 13.9 chap 13 of science( Magnetic Effects of Electric Current )

Answer 1

Firstly you have take a roll of non conducting metal then you have to wrap coil on its both ends of around 50 or 100 times then coil of one end of roll you have to connect it to a battery with a key , the coil of the other end of roll you have to connect a galvanometer to it and then when you will turn on the key you will see that the needle of the galvanometer jumps up and shows current is going into that and, when you will disconnected the coil 1 from that then you will see that the needle of the galvanometer is moving in opposite direction this shows the experiment done by "Faraday".

Answer 2

When current is passed through coil 1 it creates a magnetic field around it , due to which there is change in magnetic field around coil 2, it induces electric current into it for a moment, due to this there is deflection in galvanometer's needle in the right direction for a while and its needle returns to 0.

When key is closed, the magnetic field around coil 1 disappears, this again changes magnetic field around coil 2, but this time the current is induced in opposite direction (i.e. left)for a while and returns to 0.