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In the arrangement shown, a gas is filled inside a balloon, which is placed in a vertical magnetic field of intensity BB. The initial volume of balloon is VoV_{o} and the gas is filled inside it at the rate of a m3/sa~m^{3}/s. If there is no leakage, the emf induced (in mV) at t=π8 sect=\frac{\pi}{8}~sec, in a conducting ring which is elastic and placed horizontally along the circumference of balloon is nn.

[Take B=1.5 T, Vo=(20π)m3, a=2B=1.5~T,~V_{o}=(20 \pi)m^{3},~a=2]

Find n\large{Find~n}

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