Basic Maths and Units and DimensionsHard

Question

Two long current carrying thin wires, both with current I, are held by the insulating threads of length L and are in equilibrium as shown in the figure, with threads making an angle ′θ′ with the vertical. If wires have mass λ per unit length then the value of I is :- (g = gravitational acceleration)
     

Options

A.
B.
C.
D.

Solution


B =
tan θ = where fB is force per unit length(Bi)
λg tan θ =
on solving
I = 2 sin θ

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