Which of the following best states the principle that determines the direction of an…
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Which of the following best states the principle that determines the direction of an induced current in a conducting loop?
(a) The induced current flows in such a way that the magnetic field it produces opposes the external magnetic field that passes through the loop.
(b) The induced current flows in such a way that the magnetic field it produces opposes the change in magnetic flux through the loop.
(c) The induced current flows in such a way that the magnetic field it produces reinforces the change in magnetic flux through the loop.
(d) The induced current only appears when a constant (unchanging) magnetic field is present inside the loop.