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Magnetic Effects of Electric Current

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Question

why magnetic field at centre of current loop and magnetic field at centre of circular wire have two different formulas?

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Solution

$D e a r S t u d e n t, T h i s i s b e c a u s e t h e c u r r e n t l o o p c a n b e o f a n y l e n g t h a n d t h a t l e n g t h m a y o r m a y n o t b e a c i r c u m f e r e n c e t h a t m a y b e a n a r c . O n t h e o t h e r h a n d c i r c u l a r w i r e r e p r e s n t s a w h o l e c i r c l e n o t a n a r c . R e g a r d s$

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