AP EAMCET · PHYSICS · Magnetic Effects of Current
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 \(r>R\).
- A \(\frac{\mu_0 \delta_0^r}{2 \pi R^2}\)
- B \(\frac{\mu_0{ }^{\prime} D}{2 \pi R}\)
- C \(\frac{\mu_0 / D}{2 \pi r}\)
- D Zero
Answer & Solution
Correct Answer
(C) \(\frac{\mu_0 / D}{2 \pi r}\)
Step-by-step Solution
Detailed explanation
The given situation is shown in the following figure. Magnetic field at point \(P\) at a distance \(r \diamond R)\) due to current \(I_D\) is given as \[ B=\frac{\mu_0}{2 \pi} \cdot \frac{I_D}{r} \quad\left[\because B=\frac{\mu_0}{2 \pi} \cdot \frac{I}{r}\right] \]
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