Electro Magnetic Induction And Alternating Currents Question 513

Question: The magnetic flux ϕ linked with a conducting coil depends on time as ϕ=4tn+6 , where n is a positive constant. The induced emf in the coil is e. Then which is wrong?

Options:

A) If 0<n<1 , e0 and .|e.| decreases with time

B) If n=1, e is constant

C) If n > 1, |e| increases with time

D) If n>l, |e| decreases with time

Show Answer

Answer:

Correct Answer: D

Solution:

  • ϕ=4tn+6

    dϕdt=4ntn1

    |e|=4ntn1 ,

    |.e|.=4nt1n



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