contestada

When is a magnetic field generated?
A.
whenever a wire is in contact with a permanent magnet
B.
at the instant when the current through a wire stops
C.
whenever a current is passing through a wire
D.
at the instant when the current changes direction

Respuesta :

When is a magnetic field generated...

C. whenever a current is passing through a wire

(I know for a fact that they are generated whenever an electrical charge is in motion) hope this helps

sorry if i got it wrong :(