Question

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Answer 1

Answer:

Magnetic effect of electric current is being shown up here.

On increasing the no. of electric cells in the circuit, intensity of the magnetic field will be increased.

The intensity will be same if distance between conductor and magnetic needle is increased, but needle will be less deflected in that case.

Polarity of the circuit will be reversed and the needle will now deflect in opposite direction

Electromagnet and Galvanometer.

Answer 2

Explanation:

If the current is increased then the magnetic field produced stronger and vice-versa. So, deflection in the campus will be more when the current flowing through the wire will be increased.

It is established that an electric current through a metallic conductor produces a magnetic field around it.