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The magnetic flux linked with a coil is given by an equation ϕ  (in webers) =  8t2+3t+5. The induced e.m.f. in the coil at the four seconds will be

a
16 units
b
39 units
c
67 units
d
145 units

detailed solution

Correct option is C

e=−dϕdt=−(16t+3)=−67 units

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