G A square loop of wire sits flat on the xy plane in a magnetic field which is pointed in the positive z direction. When viewed from above, which way will current flow in the loop if the magnetic field starts to decrease in magnitude?

clockwise

Explanation:

Due to Lenz's law

we know that the magnetic flux generated by the induced current is opposite to the principal magnetic flux. Hence, if the magnetic flux is increasing the current has a clockwise direction. If the magnetic flux is decreasing the induced current has a counterclockwise direction.

In this case the current flow has a clockwise direction.

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