A wire of length L carrying a current I ...

A wire of length L carrying a current I is bent into a circle. The magnitude of the magnetic field at the centre of the circle is

`(pi mu_(0)I)/(L)`

`(mu_(0)I)/(2L)`

`(2pi mu_(0)I)/L`

`(mu_(0)I)/(2 pi L)`

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TARGET PUBLICATION-MAGNETIC EFFECT OF ELECTRIC CURRENT -Critical Thinking Introduction

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