NEET Class neet Answered
Magnetic field linked through a coil of 50Ω resistance varies with time as shown in graph.
Draw (emf v/s t) graph
Asked by jhajuhi19 | 21 Aug, 2021, 01:26: AM
Expert Answer
Induced EMF , E = -dΦ/dt
Induced EMF from time t = 0 to t = 2 s , E = - ( 25 - 0 ) / 2 = -12.5 V
Induced EMF from time t = 2 s to t = 4 s , E = 0 V , because flux is constant
Induced EMF from time t = 4 s to t = 6 s , E = - ( -20 - 25 ) / 2 = 22.5 V
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