A circular loop of flexible iron wire has an initial circumference of 168 cm, but its circumference is decreasing at a constant rate of 10.0 cm/s due to a tangential pull on the wire. The loop is in a constant uniform magnetic field of magnitude 1.00 T, which is oriented perpendicular to the plane of the loop. Assume that you are facing the loop and that the magnetic field points into the loop.
Find the magnitude of the emf induced in the loop after exactly time 4.00s has passed since the circumference of the loop started to decrease and find the direction of the induced current in the loop as viewed looking along the direction of the magnetic field.

20.353 mV

Explanation:

Given that

Circumference of the wire, = 168 cm

Rate of decrease of circumference, = 10 cm/s

Magnitude of magnetic field, = 1 T

Time taken, = 4 s

See attachment for calculations.

Thus, the emf after 4 s is 20.353 mV

b)

The direction is in a clockwise direction.

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

there is no correct list among the choices you've provided.

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-- baby human

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