A positively charged ball hangs from a long silk thread. Electric filed at a certain point (at the same horizontal level of ball) due to this charge is E. Let us put a positive test charge `q_(0)` at this point and measure `F//q_(0)` on this charges. 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))` or `(F)/(q_(0))=(kQ)/(r_(1)^(2)` …(ii)
As `r_(1)gtr`, so from Eqs. (i) and (ii) we get `E gt F//q_(0)`.