One end of a plastic pipe is capped and the other end is open. The pipe stands o

Question

One end of a plastic pipe is capped and the other end is open. The pipe stands on the capped end in a magnetic field of 0.850 T that is aligned vertically. The magnetic flux through the plastic of the pipe is -6.7 × 10-3 Wb. What is the inside diameter of the pipe?

10 cm

7.2 cm

2.8 cm

9.5 cm

One end of a plastic pipe is capped and the other end is open. The pipe stands on the capped end in a magnetic field of 0.850 T that is aligned vertically. The magnetic flux through the plastic of the pipe is -6.7 × 10-3 Wb. What is the inside diameter of the pipe?

10 cm

7.2 cm

2.8 cm

9.5 cm

Explanation / Answer

flux = phi = -BA

A = 6.7 x 10^-3 /0.850

pi*d^2/4 = 6.7x 10^-3 /0.850

d = sqrt( 6.7x 10^-3 *4 / 0.850 * pi )

d = 0.100 m = 10 cm ( A option )

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