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Question

Given graph shows electric field intensity due to a point charge (E) at a distance (x) from it.
Here graphs(A,B,C,D) corresponding to four charges are shown. Which graph represents the charge of higher magnitude?

A
A
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B
B
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C
C
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D
D
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Solution

The correct option is D D
From the definition of intensity of electric field,

E=kQr2

So, if r is constant.

EQ .....(1)

For the given curves, at x=r0, we can see that,

ED>EC>EB>EA

and from eq. (1)

QD>QC>QB>QA

Hence, curve D represent Ex curve of charge having bigger magnitude.

Therefore, option (d) is correct.

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