A 10 m long horizontal wire extends from North East to South West. It is falling with a speed of $5.0 \mathrm{~ms}^{-1}$, at right angles to the horizontal component of the earth's magnetic field, of $0.3 \times 10^{-4} \mathrm{~Wb} / \mathrm{m}^2$. The value of the induced emf in wire is:
