There are three long parallel wires in a plane as shown. Find force on 15 cm of length of middle wire. (A) $3 \mu \mathrm {~N}$ (B) $5 \mu \mathrm {~N}$ (C) $6 \mu \mathrm {~N}$ (D) $7 \mu \mathrm {~N}$
There are three long parallel wires in a plane as shown. Find force on 15 cm of length of middle wire.
(A) $3 \mu \mathrm {~N}$
(B) $5 \mu \mathrm {~N}$
(C) $6 \mu \mathrm {~N}$
(D) $7 \mu \mathrm {~N}$