Electrostatics Question 763

Question: A non-conducting ring of radius 0.5 m carries a total charge of $ 1.11\times {{10}^{-10}}C $ distributed non-uniformly on its circumference producing an electric field E everywhere in space. The value of the integral $ \int\limits _{\ell =\infty }^{\ell =0}{-E.dl} $ ($ \ell =0 $ being center of the ring) in volts is

Options:

A) +2

B) -1

C) -2

D) zero

Show Answer

Answer:

Correct Answer: A

Solution:

[a] $ K=\frac{V _{0}}{V}-1 $

$ =\frac{kq}{r}=-0 $

$ \frac{9\times 10^{9}\times 1.11\times {{10}^{-10}}}{0.5} $

$ \approx 2V $



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