Question

a large but decreasing flux is coming out of the page. what is happening to the flux? determine the direction of the induced b-field and the induced current in the loop. explain your answers thoroughly, no calculations required

Answer 1

The flux is decreasing.

because, magnetic flux = A*B

The direction of induced magnetic field is out of the page.

The direction of induced current is counterclockwise.

Because, when magnetic flux decreases, magnetic flux decreases through the loop.

so, emf is induced and induced current flows through the loop.

According to Lenz's law the direction of induced current is always such as to oopose te change in magnetic flux that generated it.

so, the induced magnetic field must be out of the page.

using right hand rule the direction of current in the loop must counter clock wise.