A thin semi-circular ring of radius r has a positive charge q distributed uniformly over it. The net field `vecE` at the centre O is A. `q/(4pi^(2) epsi_(0) r^(2)) hat(j)`B. `-q/(4pi^(2) epsi_(0) r^(2)) hat(j)`C. `-q/(2pi^(2) epsi_(0) r^(2)) hat(j)`D. `q/(2pi^(2) epsi_(0) r^(2)) hat(j)`

A thin semi-circular ring of radius r has a positive charge q distribu

1.	A thin semi-circular ring of radius r has a positive charge q distributed uniformly over it. The net field `vecE` at the centre O is A. `q/(4pi^(2) epsi_(0) r^(2)) hat(j)`B. `-q/(4pi^(2) epsi_(0) r^(2)) hat(j)`C. `-q/(2pi^(2) epsi_(0) r^(2)) hat(j)`D. `q/(2pi^(2) epsi_(0) r^(2)) hat(j)`
Answer» Correct Answer - C

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A thin semi-circular ring of radius r has a positive charge q distributed uniformly over it. The net field `vecE` at the centre O is A. `q/(4pi^(2) epsi_(0) r^(2)) hat(j)`B. `-q/(4pi^(2) epsi_(0) r^(2)) hat(j)`C. `-q/(2pi^(2) epsi_(0) r^(2)) hat(j)`D. `q/(2pi^(2) epsi_(0) r^(2)) hat(j)`

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