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A metal disc of radius R = 25 cm rotates...

A metal disc of radius `R = 25 cm` rotates with a constant angular velocity `omega = 130` rad `s^(-1)` about its axis. Find the potential difference between the center and rim of the disc if
(a) the external magnetic field is absent,
(b) the external uniform magnetic field `B = 5.0`mT directed perpendicular to the disc.

Text Solution

AI Generated Solution

To solve the problem, we will break it down into two parts as specified in the question. ### Part (a): Potential Difference When External Magnetic Field is Absent 1. **Understanding the System**: - We have a metal disc of radius \( R = 25 \, \text{cm} = 0.25 \, \text{m} \) rotating with an angular velocity \( \omega = 130 \, \text{rad/s} \). 2. **Centripetal Force**: ...
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