Electric Charges And Fields

Question

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

8

2

6

4

Solution

I equals open vertical bar fraction numerator 1 space over denominator straight R end fraction fraction numerator d ϕ over denominator d t end fraction close vertical bar vertical line d ϕ vertical line space vertical line I R d t vertical line d ϕ space equals space left parenthesis a r e a space o f space t r i a n g l e right parenthesis space x space R equals open parentheses 1 half x space 4 x 0.1 close parentheses space x space 10 space equals space 2 W b