Ncert Exercises & Solutions

Two identical current-carrying coaxial loops carry current \(I\) in an opposite sense. A simple amperian loop passes through both of them once. Calling the loop as \(C,\)

(a)	\(\oint B\cdot dl= \mp 2\mu_0 I\)
(b)	the value of \(\oint B\cdot dl\) is independent of the sense of \(C\).
(c)	there may be a point on \(C\) where \(B\) and \(dl\) are perpendicular.
(d)	\(B\) vanishes everywhere on \(C\).

Which of the above statements is correct?

1.	(a) and (b)	2.	(a) and (c)
3.	(b) and (c)	4.	(c) and (d)

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