A rod of 20 cm lying along the horizontal East-West direction falls freely from the roof of a building of height 3 m. If the horizontal component of the Earth's magnetic field is 0.36 G over the region, find the magnitude of Induced emf when it reaches the bottom of the building (take $g=10 m / s^2$ at that place)

$0.56 \times 10^{-4} V$

The correct answer is Option (2) → $0.56 \times 10^{-4} V$