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  • The magnetic field B crossing normally a square metallic plate of area  is changi

The magnetic field B crossing normally a square metallic plate of area 4\mathrm{m^{2}} is changing with time as shown in figure. The magnitude of induced emf in the plate during \mathrm{t = 2s\: \: to\: \: t = 4s}, is __________ \mathrm{mV}.


 

Option: 1

8


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

best_answer

\mathrm{emf=\frac{d\phi}{dt}}

\mathrm{Emf=\frac{dBA}{dt}=\frac{AdB}{dt}}

\mathrm{Emf=4.Slope \: of \: B.t \: curve }

          \mathrm{=4.\left [ \frac{8-4}{4-2} \right ]=4\times 2 }

\mathrm{Emf=8\: Volt }

   

Posted by

Shailly goel

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