A loop of wire is placed in a large region containing a magnetic field directed

Question

A loop of wire is placed in a large region containing a magnetic field directed into the page, as shown (Figure 2). Which of the following changes would result in a clockwise emf induced in the loop?

Mark all the correct statements among those provided below.

View Available Hint(s)

Mark all the correct statements among those provided below.

increase the magnitude of the magnetic field

pull points A and D apart, “squeezing” the loop rotate the loop 45° about axis AC reshape the wire into the shape of a circle decrease the magnitude of the magnetic field rotate the loop 45° about axis AB

increase the magnitude of the magnetic field

Explanation / Answer

by Lenzs law we can say that current is induced in the direction in such a way that it opposes change in flux

e=-dpi/dt

where pi is the flux

the clockwise induced current produce induced magnetic field into the page.this will happen when magnetic field decreases.

fourth option is the correct answer

drease in magnitude of magnetic field

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