A horizontal straight wire \( 5 \, \text{m} \) long extending from east to west falling freely at right angle to horizontal component of earths magnetic field \( 0.60 \times 10^{-4} \, \text{wB m}^{-2} \). The instantaneous value of emf induced in the wire when its velocity is \( 10 \, \text{m s}^{-1} \) is __________ \( \times 10^{-3} \, \text{V} \).
