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Three long, straight and parallel wires are arranged as shown in Fig. The forces experienced by 10 cm length of wire Q is

A

`1.4xx10^-4 N` towards the right

B

`1.4xx10^-4 N` towards the left

C

`2.6xx10^-4 N` towards the right

D

`2.6xx10^-4 N` towards the left

Text Solution

Verified by Experts

The correct Answer is:
A
(a) `F=(4pixx10^-7xx20xx10xx10xx10^-2)/(2pixx2xx10^-2)`
`-(4pixx10^-7xx10xx30xx10xx10^-2)/(2pixx10xx10^-2)`
`=(4pixx10^-7xx10xx10^-2)/(2pixx10^-2)[100-30]`
`=20xx10^-7xx70=1400xx10^-7`
`=1.4xx10^-4N toward right`.
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