First slide
Magnetic Flux
Question

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

Easy
Solution

q=ϕR ϕ=qR=(Area under the curve) x R                      =4 x 0.12 x 10=2 weber

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