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Question

The electric field on two sides of a charged plate is shown in the figure. The surface charge density on the plate is given by :
1166557_86998f9073ef4af2aef341dac5f9be93.PNG

A
2 E0
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B
4 E0
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C
10 E0
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D
Zero
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Solution

The correct option is B 4 E0
Solution Net Electric flux
=E1.n1+E2.n2
E1=8v/m
=E1.Acos(180)+E2Acos(0)
=(8)A(1)+(12)A(1)
=4A
By Gauss Law :
Net flux = ginclosedε0
4A=ginclosedε0
4ε0=ginclosedA= surface charge density of plot.
Option - B is correct.

1145625_1166557_ans_227db6fe8c63489f89ca4f5ceee4b2e4.jpg

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