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Question
The flux linked with a coil at any instant 't' is given by ϕ=10t2−50t+250. The induced emf at t=3s is
The flux linked with a coil at any instant 't' is given by ϕ=10t2−50t+250. The induced emf at t=3s is
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Solution
The correct option is B -10 V
Farady's law states that time varying magnetic flux can induce an e.m.f.
E = Electric field induced
E=−dϕdt
E(t)=−d(10t2−50t+250)dt=−(20t−50)V
E(t=3s)=−(20(3)−50)V=−10V
Farady's law states that time varying magnetic flux can induce an e.m.f.
E = Electric field induced
E=−dϕdt
E(t)=−d(10t2−50t+250)dt=−(20t−50)V
E(t=3s)=−(20(3)−50)V=−10V
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