in
an opposite sense. A simple amperian loop passes through both of them once.
Calling the loop as C,
(a) 
(b) the
value of
is independent of sense of C
(c) there may be a point on C where 
and 
are perpendicular
(d) vanishes everywhere on C
Answer:
(b,c)Consider a simple
amperian loop passing once through both the identical current carrying coaxial
loops.
(i) According
to Ampere circuital law,
. Hence,
option (a) is wrong.
(ii)
As
, therefore 
is independent of sense of
C. Thus option (b) is correct.
(iii)
There will be a point on loop C, lying at the axis of two loops A and B, where 
and 
are perpendicular to each
other. Thus option (c) is correct.
(iv)
The value of does not vanish on various
points of C. Thus option (d) is wrong.
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