In a coil of inductance 10H , the induced current developed by changing magnetic flux through it, is shown in figure asa function of time . The magnitude of change in flux through the coil (in weber) is __

Options

A. 8
B. 2
C. 6
D. 4

Answer

B

Explanation

`e=(Deltavarphi)/(Deltat)rArri=(Deltavarphi)/(RDeltat)`
`rArrDeltavarphi=iRDeltat=RiDeltat`
Change in flux = R (Area under `i-Deltat` graph)
= `R(1/2xx4xx0.1)=10xx2xx0.1=2wb`.