Magnetic Effects Of Current Question 222

Question: Two long straight parallel conductors separated by a distance of 0.5m carry currents of 5A and 8A in the same direction. The force per unit length experienced by each other is [Kerala (Med.) 2002]

Options:

A) $ 1.6\times {{10}^{-5}}N $ (attractive)

B) $ 1.6\times {{10}^{-5}}N $ (repulsive)

C) $ 16\times {{10}^{-5}}N $ (attractive)

D) $ 16\times {{10}^{-5}}N $ (repulsive)

Show Answer

Answer:

Correct Answer: A

Solution:

$ F={{10}^{-7}}\frac{2i_{1}i_{2}}{a}={{10}^{-7}}\times \frac{2\times 5\times 8}{0.5} $ $ =1.6\times {{10}^{-5}} $ (Attractive)