Magnetic field due to a current in a solenoid

Question 1 What is a solenoid?

Question 2 Draw the pattern of field lines due to a solenoid carrying electric current?

Magnetic field due to a current in a solenoid

A solenoid is a coil of many turns of an insulated copper wire closely wound in the shape of a tight spring.

When an electric current flow through a solenoid,magnetic field is set up around solenoid similar to that of a bar magnet.

One end of a solenoid act as a north pole and other as south pole.

Magnetic field is represented by straight magnetic field lines parallel and very close to each other.

Magnetic field inside a long solenoid decreases as we move towards ends of solenoid because magnetic field lines near the ends of solenoid start spreading out.

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