In a coil of resistance 100 Ω, a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude of change in flux through the coil is

250 Wb

275 Wb

200 Wb

225 Wb

Solution

250 Wb

straight q space equals space fraction numerator increment straight ϕ over denominator straight R end fraction increment straight ϕ space equals space change space in space flux straight q space equals space integral Idt equals space Area space of space current space minus time space graph space equals 1 half space straight x space 10 space straight x space 0.5 space equals space 2.5 space coloumb straight q space equals fraction numerator increment straight ϕ over denominator straight R end fraction increment straight ϕ space equals space 2.5 space straight x space 100 space equals space 250 space space wb

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