1.

A wire of length L, mass m and carrying a current I is suspended from point O as shown, An another infinitely long wire carrying the same current I is at a distance L below the lower end of the wire. Given i=2A, L=1m and m=0.1kg (In 2=0.693) At what distance r from the suspended wire, the new wire (having the same current) should be placed to keep it stationary.

Answer»

`2.9`m
`1.9`m
`1.3`m
`2.4`m

Answer :C


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