Two very long

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

Two very long, straight, parallel wires carry steady currents

I

-I

respectively. The distance between the wires is

d

. At a certain instant of time, a point charge

q

is at a point equidistant from the two wires, in the plane of the wires. Its instantaneous velocity

\vec{v}

is perpendicular to this plane. Find the magnitude of the force due to the magnetic field acting on the charge at this instant. (1)

\frac{\mu_0 Iqv}{2\pi d}

(2)

\frac{\mu_0 Iqv}{\pi d}

(3)

\frac{2\mu_0 Iqv}{\pi d}

(4) 0