A long aluminium rod of mass rests on two smooth rails placed in a uniform magnetic…

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

Problem

0.10\,\text{m}

long aluminium rod of mass

50\,\text{g}

rests on two smooth rails placed in a uniform magnetic field of

0.80\,\text{T}

. The field is perpendicular to the rod, and a current of

12\,\text{A}

flows through it. Neglecting friction, find the acceleration produced in the rod. (a)

0.96\,\text{m s}^{-2}

(b)

24\,\text{m s}^{-2}

(c)

19.2\,\text{m s}^{-2}

(d)

9.6\,\text{m s}^{-2}