Question

While moving from one end to another end inside a solenoid, its magnetic field

(a) increases

(b) decreases

(c) remains same 

(d) first increases then decreases

Answer 1

(c) remains same 

When a magnetic field is generated inside a solenoid it is very much proportional to both the applied current and the number of turns per unit length hence the magnetic field does not dependent on the diameter of the solenoid and the field inside remains constant.