$1.8 \times 10^{-4} \text{ volt}$
Using Faraday’s law,
emf = B × l × v
Given:
B = 0.3 T
l = 3 cm = 0.03 m
v = 2 cm/s = 0.02 m/s
So,
emf = 0.3 × 0.03 × 0.02
= 1.8 × 10-4 V
Therefore, the induced emf is 1.8 × 10-4 volt.
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