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(C) The total length of the wire is $L$,and it forms $n$ turns of radius $R$. Thus,$L = n(2\pi R)$.From this,the radius $R$ is given by $R = \frac{L}{

Vedclass · Accepted Answer

$\frac{\mu_0 I}{4\pi} \frac{4\pi^2 n^2}{L}$

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(C) The total length of the wire is $L$,and it forms $n$ turns of radius $R$. Thus,$L = n(2\pi R)$.From this,the radius $R$ is given by $R = \frac{L}{2\pi n}$.The magnetic field at the center of a circular coil with $n$ turns is $B = n \left( \frac{\mu_0 I}{2R} \right)$.Substituting the value of $R$ into the formula:$B = n \left( \frac{\mu_0 I}{2 \left( \frac{L}{2\pi n} \right)} \right)$$B = n \left( \frac{\mu_0 I \cdot 2\pi n}{2L} \right) = \frac{\mu_0 I \cdot 2\pi n^2}{2L} = \frac{\mu_0 I \cdot \pi n^2}{L}$.To match the given options,we multiply and divide by $4\pi$:$B = \frac{\mu_0 I}{4\pi} \cdot \frac{4\pi^2 n^2}{L}$.

If a wire of length $L$ forms a loop of radius $R$ and has $n$ turns,find the magnetic field at the center of the loop. The current flowing in the loop is $I$.

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