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. B.dl=2μ0I.
b. the value of B.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 are correct?
1. a and b
2. a and c
3. b and c
4. c and d

Subtopic:  Ampere Circuital Law |
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