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# Electromagnetic Induction: Induced current in rotating disk

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Assume a rotating (angular velocity W) metal disk located in the x-y plane with a constant magnetic field B perpendicular to the disk.

A circuit containing a resistor is connected between the spindle (axis) the disk rotates on and a spring contact that is in contact with the outer edge of the disk.

What is the current flowing through the circuit?

Please explain reasoning and show equations used to solve.

https://brainmass.com/physics/emf/electromagnetic-induction-induced-current-rotating-disk-287365

#### Solution Preview

Assume a rotating (angular velocity W) metal disk located in the x-y plane with a constant magnetic field B perpendicular to the disk.
A circuit containing a resistor is connected between the spindle (axis) the disk rotates on and a spring contact that is in contact with the outer edge of the disk.
What is the current flowing ...

#### Solution Summary

Induced current in a disk rotating a magnetic field is determined.

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