AP EAMCET · PHYSICS · Magnetic Effects of Current
The magnetic field normal to the plane of a coil of \(N\) turns and radius \(r\) which carries a current \(i\) is measured on the axis of the coil at a distance \(h\) from the centre of the coil. This is smaller than the field at the centre by the fraction,
- A \(\frac{3}{2} \cdot \frac{h^2}{r^2}\)
- B \(\frac{2}{3} \cdot \frac{h^2}{r^2}\)
- C \(\frac{3}{2} \cdot \frac{r^2}{h^2}\)
- D \(\frac{2}{3} \cdot \frac{r^2}{h^2}\)
Answer & Solution
Correct Answer
(A) \(\frac{3}{2} \cdot \frac{h^2}{r^2}\)
Step-by-step Solution
Detailed explanation
The magnetic field normal to the plane of a coil of \(N\) turns and radius \(r\) having current \(i\) on the axis at a distance \(h\) from the centre is given by…
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