Question

There is a cw induced current in the conducting loop shown in FIGURE EX30.9. Is the magnetic field inside the loop increasing in strength, decreasing in strength, or steady?

Short answer

The magnetic field within the loop is dwindling.

Step-by-step solution

 Step1: Lenz's law is defined as follows:

Lenz's law, named after Emil Lenz, is based on the principle of conservation of energy and Newton's third law. It is the most fundamental method for determining the direction of the induced current. It claims that the direction of the induced current is always such that it opposes the change in the circuit or magnetic field that causes it.

 Step2:Applying magnetic field

The induced magnetic field is directed toward the page because the induced current is CW. The applied magnetic field is being absorbed by the page. As a result, when the induced magnetic field is directed in the same direction as the applied magnetic field, the magnetic flux and thus the magnetic field strength decrease.