AP EAMCET202022 Sep 2020Morning ShiftPhysicsMagnetic Effects of CurrentActual
A circular parallel plate capacitor of radius R and spacing d is being charged by a constant current I_D . Find the magnetic field between the plates at a distance r from the axis, where r>R .
Options
- A₀ ₀^r 2 R^2
- B₀ ^ D 2 R
- C₀ / D 2 r
- DZero
Correct answer
C. ₀ / D 2 r
Step-by-step solution
The given situation is shown in the following figure. Magnetic field at point P at a distance r R) due to current I_D is given as B= ₀ 2 I_D r [ B= ₀ 2 I r ]