alleryStart learning →Two parallel wires carry 10 A and 5 A, 5 cm apart. The force per metre is:
A1 x 10^-4 N
B4 x 10^-4 N
C5 x 10^-5 N
D2 x 10^-4 N
Answer & Solution
Correct answer: D. 2 x 10^-4 N
F/L = 2 x 10^-7 x 10 x 5/0.05 = 2 x 10^-4 N per metre.
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