Electromagnetic Induction

A metallic rod of length \(1 \mathrm{~m}\) held along east-west direction is allowed to fall down freely. Given horizontal component of earth's magnetic field \(B_H=3 \times 10^{-5} \mathrm{~T}\). the emf induced in the rod at an instant \(t=2 \mathrm{~s}\) after it is released is

(Take, \(g=10 \mathrm{~ms}^{-2}\) )