Describe some experiment to show that the magnetic field is associated with an electric current.
let us take a copper wire AB on a plane such that it faces North-South. Now place a plotting compass under it. connect both end to a battery with a switch to put it on and off.
When the switch is on then the plotting compass needle shows deflection. When its turned off then the compass stop showing any deflection. This shows that the magnetic field is associated with electric field.