Electro Magnetic Induction And Alternating Currents Question 359

Question: The magnetic flux linked with a coil is given by an equation $ \varphi $ (in webers) = $ 8t^{2}+3t+5 $ . The induced e.m.f. in the coil at the fourth second will be [MP PET 1990]

Options:

A) 16 units

B) 39 units

C) 67 units

D) 145 units

Show Answer

Answer:

Correct Answer: C

Solution:

$ e=-\frac{d\varphi }{dt}=-( 16t+3 )=-67units $



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