Problem

A conductor of length

l

is placed perpendicular to a horizontal uniform magnetic field

B

. Suddenly, a certain amount of charge is passed through it, when it is found to jump to a height

h

. The amount of charge that passes through the conductor is (a)

\frac{m\sqrt{gh}}{Bl}

(b)

\frac{m\sqrt{gh}}{2Bl}

(c)

\frac{m\sqrt{2gh}}{Bl}

(d) None of these