Question

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

(a) more at the ends than at the centre 

(b) a minimum in the middle 

(c) same at all points 

(d) found to increase from one end to the other

Answer 1

The answer is (c) same at all points

• Inside the solenoid magnetic field lines are straight. 
• This indicates strong magnetic field.
• Hence magnetic field is uniform at all points inside the solenoid.