Solenoids

Question 1

Inside a solenoid

Answer 1

Magnetic field lines are evenly spread and point in the same direction (almost uniform)

Question 2

Outside a solenoid

Answer 2

Field lines change direction and are not evenly spaced

Question 3

How can the strength of the solenoid be increased?

Answer 3

-increase the current
-more turns
-move the turns closer
-put a soft iron core in the middle of the solenoid (a material which is magnetically soft can be easily magnetised and demagnetised)