alleryStart learning →Two parallel wires carry 5 A and 8 A, 0.2 m apart. Force per metre is
A8 x 10^-5 N/m
B2 x 10^-5 N/m
C4 x 10^-5 N/m
D4 x 10^-6 N/m
Answer & Solution
Correct answer: C. 4 x 10^-5 N/m
f = 2e-7 x I1 x I2/d = 2e-7 x 5 x 8/0.2 = 4e-5 N/m.
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