Asked by tangocharliee | 15th Nov, 2009, 03:10: PM
A non conducting magnet indicates the magnet is not an electro-magnet. For example, ceramic is a non conducting magent. An electro-magent is one which becomes a magnet when current flows through it.
A charged disc rotating at constnt angular velocity is equivalent to a steady current in circular wire. We need to calculate this current to find the magnetic field. Let us consider any one cross-section of the wire and all charges must pass through this crosssection in one time period of revolution.
Hence current is:
I = q/T = q (ω / 2π)
Magnetic field due to steady current in a circular wire is:
B = µoI / 2R
Substituting for current , we have,
B = µoqω / 4πR
Hope this helped.
Answered by | 17th Dec, 2009, 11:48: AM
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Verify mobile number
Enter the OTP sent to your number