Question

A square, 36.0-turn coil that is 11.0 cm on a side with a resistance of 0.850Ω is placed between the poles of a large electromagnet. The electromagnet produces a constant, uniform magnetic field of 0.700 T directed into the screen. As suggested by the figure, the field drops sharply to zero at the edges of the magnet. The coil moves to the right at a constant velocity of 2.80 cm/s. A shaded, rectangular region of uniformly distributed X's signifying a magnetic field into the screen, and a clear region to the right of the shaded region. Inside and near the middle of the shaded region is a smaller square coil moving to the right with velocity V. The coil is labeled as having N turns.

What is the current

i

1

through the wire coil before the coil reaches the right edge of the field? Define counterclockwise current as positive and clockwise current as negative.

i

1

=

A

What is the current

i

2

through the wire coil while the coil is leaving the field?

i

2

=

A

What is the current

i

3

through the wire coil after the coil leaves the field?

i

3

=

A

What is the total charge magnitude

∣

Δ

Q

∣

that flows past a given point in the coil as it leaves the field?

∣

Δ

Q

∣

=

C

Answer 1

For last part, current will keep on passing through the coil till its left most arm will move in the magnetic field so to find the total charge passed, we first find the total time the left most arm take to cross through the magnetic field.