1.

Two parallel wires in free space are 10 cm apart and each carries a current of 10 A in the same direction. The force one wire exerts on the other per metre of length is                    [CBSE PMT 1997; AFMC 1999]

A.            \[2\times {{10}^{-4}}N\], attractive                               
B.            \[2\times {{10}^{-4}}N\], repulsive
C.            \[2\times {{10}^{-7}}N\], attractive                               
D.            \[2\times {{10}^{-7}}N\], repulsive
Answer» B.            \[2\times {{10}^{-4}}N\], repulsive


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