Q.
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
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a
16 units
b
39 units
c
67 units
d
145 units
answer is C.
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Detailed Solution
e=−dϕdt=−(16t+3)=−67 units
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