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Obtain an expression for magnetic flux d...

Obtain an expression for magnetic flux density B at the centre of a circular coil of radius R, having N turns and carrying a current I.

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To derive the expression for the magnetic flux density \( B \) at the center of a circular coil of radius \( R \), having \( N \) turns and carrying a current \( I \), we can follow these steps: ### Step 1: Consider a small element of the coil Let's consider a small element \( dl \) of the circular coil. The magnetic field \( dB \) at the center of the coil due to this small element can be expressed using the Biot-Savart law. ### Step 2: Apply the Biot-Savart Law According to the Biot-Savart law, the magnetic field \( dB \) due to a current element \( I \) is given by: \[ ...
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