The secondary coil of a transformer forms a closed loop
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
The secondary coil of a transformer forms a closed loop. If the current in the primary coil is increasing with time, which statement correctly describes the direction of the induced current in the secondary coil?
(a) It flows in the same direction as the increasing current in the primary coil.
(b) No current is induced because the magnetic field is uniform.
(c) It flows so as to oppose the increase of current in the primary coil.
(d) It flows so as to enhance the increase of current in the primary coil, strengthening the common magnetic field.