28.
A long vertical straight conductor (not shown) is placed at o in figure, carries an
inward current of 5A. A small straight wire X of length 0.03 m is placed along the
tangent to the circle of centre O and radius 0.1m as shown. If X carries a current of 2A.
The force on Xin N is:
(b) 6 x 10-
(c) Zero
(d) 3 x 10 -
(a) 9 x 10-7
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