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Q.

Proton and α - particle are put  1A∘  apart in Air. Mangitude of intensity of electric field due to Proton at  α  - particle is ( N/ C )

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a

Zero

b

2.88×1011

c

1.44×1011

d

5.76×1011

answer is C.

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Detailed Solution

E=14πε0qr2      =9×109×1.6×10−19(10−10)2=1.44×1011Nc
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