Current balance

Question 1

1-

Answer 1

A horseshoe magnet is made by placing two flat magnets on a U shaped iron core

Question 2

2-

Answer 2

A length if inflexible wire is firmly fixed between the poles of the magnet

Question 3

3-

Answer 3

When the current is switched on a downward force the magnet due to the current cause on the upward force on the wire

Question 4

4-

Answer 4

There’s a change in reading and it is the measure if the electromagnetic force which is proportional to T