A straight conducting rod long moves with a uniform speed of perpendicular to a…

PHYSICS · Single correct · CBSE · Physics · Electromagnetic Induction · Electromagnetic Induction

Problem

A straight conducting rod

0.50\,\text{m}

long moves with a uniform speed of

2.0\,\text{m\,s}^{-1}

perpendicular to a uniform magnetic field of

0.40\,\text{T}

. The rod forms part of a closed rectangular circuit of total resistance

0.20\,\Omega

. If the rod is kept moving at the given speed, how much mechanical power must an external agent continuously supply to it? (a)

1.60\,\text{W}

(b)

0.40\,\text{W}

(c)

0.80\,\text{W}

(d)

2.00\,\text{W}