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Charges `q` is uniformly distributed over a thin half ring of radius `R`. The electric field at the centre of the ring isA. `q/(2pi^(2)epsilon_(0)r^(2))hat(i)`B. `q/(4pi^(2)epsilon_(0)r^(2))hat(j)`C. `-q/(4pi^(2)epsilon_(0)r^(2))hat(j)`D. `-q/(2pi^(2)epsilon_(0)r^(2))hat(i)` |
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Answer» Correct Answer - D `vec(E)=(2k lambda)/r(-hat(j))=2/((4pi in_(0) r))q/((pi r))(-hat(j))` |
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