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The electron in a hydrogen atom can be thought of as orbiting around the nucleus (a...

The electron in a hydrogen atom can be thought of as orbiting around the nucleus (a single proton) in a circular orbit of radius 5.28×10−11m  with a velocity of constant magnitude 2.190×106m/s . At t=  0s  a hydrogen atom is placed in a vacuum chamber that is filled with a uniform magnetic field of magnitude 3.3×1011T  pointing in the positive z -direction. The hydrogen atom is oriented such that its electron is orbiting counter-clockwise in the xy -plane at t=  0s .

At t=  12s , the uniform magnetic field is rotated so that it points in the negative x -direction.

What is the direction of the MAGNETIC TORQUE exerted on the hydrogen atom at t= 12s ?

In the positive x -direction.
In the negative x -direction.
In the positive y -direction.
In the negative y -direction.
In the positive z -direction.
In the negative z -direction.

There is no magnetic torque exerted on the hydrogen atom.

NEED A CORRECT ANSWER READ ENTIRE QUESTION NOT NEGATIVE Y

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