Question

pls answer this and pls ignore the magnetic field lines pls and it's really very urgent​

Answer 1

Answer:

When the key will be inserted there will be deflection in the galvanometer.

When key is removed the galvanometer reading comes to zero .

Explanation:

This is due induction of current to second coil due to magnetic field which produce electric current.

Answer 2

Answer:

When the key is inserted then current starts flowing in the coil 1 which produces magnetic field around the coil and these magnetic field induces current in the second coil that's why the needle of galvanometer deflects to any one the side.

When the key is removed then current stops flowing which results in the decrease of magnetic field and eventually the induced current is generated in the second coil because of changing magnetic field. This time the galvanometer needle deflects to opposite side of case 1.

Hope it helps!!!!!