Questions
Two long wires have uniform charge density per unit length each. The wires are non-coplanar and mutually perpendicular. Shortest distance between them is d. The Interaction force between them is:
detailed solution
Correct option is A
F=∫dF=∫Ecosθdq=∫Ecosθλ.dy=∫λ2π∈0rcosθ λ.dy Now , yd=tanθ ⇒ dy=d.sec2θdθ Also, dr=cosθ ⇒r=d.secθ ∴F=∫dF=∫λ2π∈0dsecθcosθλ dsec2θdθ ⇒F=λ22π∈0∫−π2π2dθ=λ22∈0Talk to our academic expert!
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