1. A circular loop sits in the x y plane, centered on the origin, and a uniform

Question

1. A circular loop sits in the x y plane, centered on the origin, and a uniform magnetic field points in the positive x direction. The loop is rotated 360 degrees about the 3 coordinate axes, first the x, then the y, then the z. In which of these cases will current be induced in the loop? (choose all that are true)

a)Rotation about the x axis.

b)Rotation about the y axis.

c)Rotation about the z axis.

2. A circular loop of wire sits in the x y plane, centered on the origin. A bar magnet sits above the loop on the z-axis with its south pole pointing in the z direction. If the magnet is moved away from the loop along the z axis, what direction will the current induced in the loop run?

a)clockwise when viewed from above (positive z side)

b)counter-clockwise when viewed from above (positive z side)

c)left

d)right

Explanation / Answer

1 )

the rotation along X and Y axis is correct

so options a and b are correct beacuse

the loop rotates about X and Y axis so no magnetic flux changes about z -axis

so currents induced in X and Y axis

2 )

b) counter-clockwise when viewed from above (positive z side)

this is beacuse the LENZ's Law

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