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A thin semi-circular ring of radius r has a positive charge q distributed uniformly over it. The net
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Q 7. A thin semi-circular ring of radius r has a positive charge q distributed uniformly over it. The net field E ⃗ at the centre O is –
a. q/(2π^2 ϵ_0 r^2 ) j ̂ b. q/(4π^2 ϵ_0 r^2 ) j ̂
c. -q/(4π^2 ϵ_0 r^2 ) j ̂ d. -q/(2π^2 ϵ_0 r^2 ) j ̂
AIEEE 2010
#NEET_PYQ #JEE_PYQ
a. q/(2π^2 ϵ_0 r^2 ) j ̂ b. q/(4π^2 ϵ_0 r^2 ) j ̂
c. -q/(4π^2 ϵ_0 r^2 ) j ̂ d. -q/(2π^2 ϵ_0 r^2 ) j ̂
AIEEE 2010
#NEET_PYQ #JEE_PYQ
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