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1. |
A long wire A carries a current of 10 amp. Another long wire B, Which is parallel to A and separated by 0.1m from A, carries a current of 5 amp, in the opposite direction to that in A. what is the magnitude and nature of the force experienced per unit length of B \[({{\mu }_{0}}=4\pi \times {{10}^{-7}}\,weber/amp\text{-}m)\] [MP PET 2000] |
A. | Repulsive force of \[{{10}^{-4}}N/m\] |
B. | Attractive force of \[{{10}^{-4}}N/m\] |
C. | 36,000 |
D. | Attractive force of \[2\pi \times {{10}^{-5}}N/m\] |
Answer» B. Attractive force of \[{{10}^{-4}}N/m\] | |