Wires 1 and 2 carrying currents `i_1 and i_2` respectively are inclined at an angle `theta` to each other. What is the force on a small element `dl` of wire 2 at a distance of r from wire 1 (as shown in the figure) due to the magnetic field of wire 1 ?

Options

A. `(mu_0)/( 2 pi r ) i_1 i_2 d tan theta `
B. `(mu_0)/( 2 pi r) i_1 i_2 dl sin theta `
C. `(mu_0)/( 2pi r) i_1 i_2 dl cos theta `
D. `(mu_0)/(4 pi r) i_1 i_2 dl sin theta `

Answer

C