Question

A wire carries a current I ampere in a semicrcle. The semicircle has a radius r. The magnetic field at the centre C will be :
​(A) zero
(B) πΙ/r * 10​-7 Newton/ampere-metre
(C) πl/r Newton/ampere-metre (D) πl/r gauss

Answer with explanation

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Answer 1

zero will be the answer

Answer 2

$\bold{Hello}$

This question can be easily solved by applying the formulae of magnetic field at the centre of a semicircle.

Formulae :-

B = $\huge{\frac{\mu i}{4r}}$

Here ,

$\bold{\mu = 4 \pi * 10^{-7}}$

Put this value in formulae .

Value of magnetic field at centre of semicircle will be πΙ/r * 10​-7 Newton/ampere-metre

Option B)







Hope It Helps You ^_^