A conducting wire is bent into an L-shape consisting of two mutually perpendicular arms

MATHEMATICS · Single correct · A Level · Mathematics · Vectors · Vectors

Problem

A conducting wire is bent into an L-shape consisting of two mutually perpendicular arms, each

0.15\,\text{m}

long. A current of

10\,\text{A}

flows from the corner towards the free ends of both arms. The assembly is placed in a uniform magnetic field of

0.40\,\text{T}

directed vertically upward, while both arms lie in the horizontal plane. What is the magnitude of the net force on the entire L-shaped wire? (a)

1.20\,\text{N}

(b)

0.60\,\text{N}

(c)

0.85\,\text{N}

(d)

0.42\,\text{N}