Question

The magnetic field at the centre of a circular loop carrying current I is : (A) Directly proportional to I (B) Inversely proportional to I (C) Directly proportional to I2 (D) Inversely proportional to I2

Answer 1

Answer:

The magnitude of magnetic field is directly proportional to the magnitude of current through the loop. ... The magnitude of magnetic field is inversely proportional to the radius of the circular loop. i.e. \begin{align*}B \propto \frac{1}

Explanation:

The magnetic field strength at the center of a circular loop is given by B=μ0I2R(at center of loop), where R is the radius of the loop. RHR-2 gives the direction of the field about the loop.

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