An electric current is always accompained by a magnetic field', was discovered by

A coil carrying electric current is placed in uniform magnetic field

A coil carrying electric current is placed in uniform magnetic field

A coil carrying electric current is placed in uniform magnetic field.

The phenomenon in which electric current is generated by varying magnetic fields is appropriately- called

When electric current I flow through a straight wire of length I placed in a magnetic field , a magnetic force of 1N acts on it . If magneitude of the electric current is halved and the magnetic field is doubled , what will be the magnetic force acting on the wire ?

Magnetic effect of current was discovered by