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Magnetic field through a coil having 200...

Magnetic field through a coil having 200 turns and corss sectional area `0.04m^(2)` changes from `0.1wbm^(-2)` to `0.04wbm^(-2)` in 0.02s. Find the induced emf.
Data : `N=200, A=0.04m^(2), B_(1)=0.1wbm^(-2)`, B_(2)=0.04wbm^(-2), t=0.02s, e=?`

Text Solution

Verified by Experts

`e= - (d phi)/(dt) = - (d)/(dt) (phi)`
`e = -(d)/(dt) (NBA) = -NA. (dB)/(dt) = -NA.((B_(2)-B_(1)))/(dt)`
`e = -200xx4xx10^(2)((0.04-0.1))/(0.02)`
`e=24V`
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Knowledge Check

  • A body of length 1m having cross sectional area 0.75m^(2) conducts heat 6000J//s . Then find the temperature difference if K=200" Jm"^(-1)"K"^(-1) .

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    B
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