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Questions  

What is the potential energy of the equal positive point charges of 1μC each held 1 m apart in air 

a
9×10−3J
b
9×10−3eV
c
2eV/m
d
Zero

detailed solution

Correct option is A

Bu using U=9×109Q1Q2r⇒U=9×109×10−6×10−61=9×10−3J

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