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  4. In the following figure, the variation of electric field magnitude E versus time is shown for four uniform electric fields contained within identical circular regions. Arrange the fields according to the magnitudes of the magnetic fields they induce at the edge of the region, in decreasing order

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Q. In the following figure, the variation of electric field magnitude $ E $ versus time is shown for four uniform electric fields contained within identical circular regions. Arrange the fields according to the magnitudes of the magnetic fields they induce at the edge of the region, in decreasing orderPhysics Question Image

AMUAMU 2013

Solution:

Magnetic fields induced will be maximum if rate of charge of electric field is maximum.
$\Rightarrow $ In graph line having maximum slope will induce maximum magnetic field
$\therefore $ Correct order is $P, R, Q, S$.