Question

6) According to oersted, around a current carrying conductor, magnetic field exists
A) None of these
B) as long as there is current in the wire
C) only few seconds after removing the current
D) even after removing the current in the wire​

Answer 1

Answer:

b) as long as there is current in the wire

Answer 2

Explanation:

Oersted observed that a magnetic compass needle deflected violently when brought close to a current carrying wire. This effect led him to conclude that moving charges in the form of a current possesses certain magnetic field, so a wire can act as a magnet.