A horizontal straight wire 5 m long extending from east to west falling freely at right angle to horizontal component of earth's magnetic field . The instantaneous value of emf induced in the wire when its velocity is is

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Solution

Q.
A horizontal straight wire 5 m long extending from east to west falling freely at right angle to horizontal component of earth's magnetic field $0.60 \times 10^{- 4}$ $W b m^{- 2}$ . The instantaneous value of emf induced in the wire when its velocity is $10 m s^{- 1}$ is _____ $\times 10^{- 3}$ V. [2024]

Ans.
(3) $B_{H} = 0.60 \times 10^{- 4} {Wb / m}^{2}$

$ε = B_{H} v l = 0.60 \times 10^{- 4} \times 10 \times 5$

$= 3 \times 10^{- 3} V$

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