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

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Q. In a coil of resistance $10 \, \Omega$, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in weber isPhysics Question Image

AIPMTAIPMT 2012Electromagnetic Induction

Solution:

$q =$ Area under $i-t$ graph
$=\frac{1}{2} \times 4 \times 0.1=0.2\, C$
As $q=\frac{\Delta \phi}{R}$
$\therefore \Delta \phi=q R=(0.2 C)(10 \Omega)=2$ weber