Electromagnetic Induction - Result Question 8

8. In a coil of resistance 10Ω, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in

Weber is :

[2012M]

(a) 8

(b) 2

(c) 6

(d) 4

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Answer:

Correct Answer: 8. (b)

Solution:

  1. (b) The charge through the coil = area of current-time (it) graph

q=12×0.1×4=0.2C

q=ΔϕR Change in flux (Δϕ)=q×R

q=0.2=Δϕ10

Δϕ=2 Weber



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