A conductor long carries a current of at right angles to a uniform magnetic field of

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

A conductor

0.30\,\text{m}

long carries a current of

10\,\text{A}

at right angles to a uniform magnetic field of

0.40\,\text{T}

. The conductor, of mass

0.20\,\text{kg}

, is free to move and travels a distance of

0.50\,\text{m}

from rest. Ignore friction. What is the kinetic energy gained by the conductor after moving the given distance? (a)

1.20\,\text{J}

(b)

0.36\,\text{J}

(c)

0.60\,\text{J}

(d)

1.0\,\text{J}