Electromagnetic Field Theory
A loop is rotating about x-axis in a magnetic field, B = BO cos(ω + φ) ay. The voltage in the loop is

 Due to transformer only.
 Zero.
 Due to rotating only.
 Due to both rotating and transformer action.

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Electromagnetic Field Theory
Inside a hollow conducting sphere

 electric field is a non zero constant.
 electric field changes with distance from the center of the sphere.
 electric field changes with magnitude of the charge given to the conductor.
 electric field is zero.

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