AP EAMCET · PHYSICS · Electromagnetic Induction
Two concentric coplanar circular conducting loops have radii \(R\) and \(r(R \gg r)\). Their mutual inductance is proportional to
- A \(\frac{r}{R}\)
- B \(\frac{R}{r}\)
- C \(\frac{r^2}{R}\)
- D \(\frac{R^2}{r}\)
Answer & Solution
Correct Answer
(C) \(\frac{r^2}{R}\)
Step-by-step Solution
Detailed explanation
Let us consider a coil having \(N_1\) turns and radius \(r\) is surrounded by another coil having \(N_2\) turns and of radius \(R\) as shown in the figure below, Magnetic field due to coil 2 at the centre, \(B_2=\frac{\mu_0 N_2 I}{2 R}\) Magnetic flux through the coil,…
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