A non-conducting ring of radius `0.5 m` carries a total charge of `1.11xx10^(-10)`C distributed non-uniformly on its circumference producing an electric field E everywhere is space. The value of the integral `int_(l=oo)^(l=0)-E.dI (l=0` being centre of the ring) in volt isA. `+2`B. `-1`C. `-2`D. `0`

A non-conducting ring of radius `0.5 m` carries a total charge of `1.1

1.	A non-conducting ring of radius `0.5 m` carries a total charge of `1.11xx10^(-10)`C distributed non-uniformly on its circumference producing an electric field E everywhere is space. The value of the integral `int_(l=oo)^(l=0)-E.dI (l=0` being centre of the ring) in volt isA. `+2`B. `-1`C. `-2`D. `0`
Answer» Correct Answer - 1 `int_(l = oo)^(l = 0) - vec(E ) . D vec(l) = V_(l = 0) - V_(l = oo) = (1)/(4 pi in_(0)) (Q)/(R ) - 0` `= (9 xx 10^(9) xx 1.11 xx 10^(-11))/(0.5) = 2 V`

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