Question

Magnetic field lines caused by a solenoid:
(a) are curves.
(b) start at north and end at south.
(c) form closed loops.
(d) is uniform everywhere.

Answer 1

Answer:

start at north pole and end at south pole

Answer 2

(d) is uniform everywhere.

Explanation:

A solenoid is a long coil of wire wrapped in many turns. When a current passes through it, it creates a nearly uniform magnetic field inside the coil. The strength of the magnetic field so produced is proportionate to the strength of the electricity passed and also the magnetic permeability of the material. The magnetic field lines inside the solenoid are in the form of parallel straight lines. This indicates that the magnetic field is the same at all points inside the solenoid.