Question

Choose the correct option.
The magnetic field inside a long straight solenoid-carrying current
(a) is zero.
(b) decreases as we move towards its end.
(c) increases as we move towards its end.
(d) is the same at all points.

Answer 1

The answer to this question option d.

The magnetic field inside a long straight solenoid-carrying current is the same at all points.

It is because the magnetic field in the solenoid is constant because the lines are completely parallel to each other.

Then the remains stay same throughout.  

It however reduces at an end when the lines move apart.

Answer 2

Answer:

(D) is the same at all points