A circular metal loop is kept entirely within a magnetic field, but moved to a region of higher field strength while not rotated. What could you do to its diameter to prevent an induced current in it? Explain.

The

The diameter will be reduced or shorten to prevent the induced current in the metal loop

explanation:

Magnetic flux is given as

Φ = BA•Cosθ

Since the angle is kept constant.

So to have same magnetic flux with larger magnetic field required only the diameter to changed

From the equation above,

Φ = BA•Cosθ

B= Φ / A•Cosθ

Since both Flux and the angle is constant

Then, The magnetic field is inversely proportional to the Area

And the areas is a function of diameter, Area = πd²/4

So to have a larger magnetic field, we need to reduce or shorten the diameter.

As d reduces, B increases.