1.

In a coil of resistance 100 Omega , 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 ……..

Answer»

250 Wb
275 Wb
200 Wb
225 Wb

Solution :`EPSILON=(DELTAPHI)/(Deltat)`
`therefore IR=(Deltaphi)/(Deltat)`
`therefore Deltaphi=IR Deltat`
`=R (I Deltat)`
`=R xx ("AREA of GRAPH" I to t)`
`=100xx1/2 xx0.5xx10`
=250 Wb


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