The strength of magnetic field inside a long current-carrying straight solenoid is:

Options

A. more at the ends than at the centre
B. minimum in the middle
C. same at all points
D. found to increase from one end to the other

Answer

C

Explanation

Magnetic field lines are straight and parallel inside the solenoid . This indicates a strong magnetic field . Hence, inside the solenoid, the magnetic field is same throughout.