A positively charged ball hangs from a long silk thread. Electric field at a certain point (at the same horizontal level of ball) due to the ball is E. If now put a postive test charge `q_(0)` at this point and measure `(F)/(q_(0))`, then E

Options

A. `gtF/(q_(0))`
B. `ltF/(q_(0))`
C. `=F/(q_(0))`
D. None of these

Answer

A

Explanation

`E=(kQ)/(r^(2))`…I

`F=(kQq_(0))/(r_(1)^(2))impliesF/(q_(0))=(kQ)/(r_(1)^(2))`……….ii
As `r_(1)gtr`, so from equation (i) and (ii) we get `EgtF/(q_(0))`