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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=? |
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Answer» SOLUTION :`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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