A thick wire is hanging from a wooden table. An anitclockwise magnetic field is to be produced around the wire by passing current through this wire by using a battery. Which terminal of the battery of the battery should be connected to the :
(a) top end of wire ?
(b) bottom end of wire ?
Give reason for your choice.

Answer

N/a

Explanation

(a) Negative terminal (b) Positve terminal , The current should be passed into wire upwards