Question

A circular loop of wire of area 25 cm2 lies in the plane of the paper. A decreasing magnetic field B is coming out of the paper. What is the direction of the induced current in the loop?

Answer 1

counterclockwise

Step-by-step explanation:

given data

area = 25 cm²

solution

We know that a changing magnetic field induces the current and induced emf is express as

`\epsilon = -N (d \phi )/(dt)` ..................................1

and we will get here direction of the induced current in the loop that is express by the Lens law that state that the direction of induces current is such that the magnetic flux due to the induced current opposes the change in magnetic flux due to the change in magnetic field

so when magnetic field decrease and point coming out of the paper.

so induced current in the loop will be counterclockwise