If point charges `Q_(1) = 2xx 10^(-7)`C and `Q_(2) = 3 xx 10^(-7)`C are at 30 cm separation, then find electrostatic force between them
If point charges `Q_(1) = 2xx 10^(-7)`C and `Q_(2) = 3 xx 10^(-7)`C are at 30 cm separation, then find electrostatic force between them
A. `2 xx 10^(-3)`N
B. `6 xx 10^(-3)`N
C. `5 xx 10^(-3)`N
D. `1 xx 10^(-3)`N
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Correct Answer - B
`therefore` Electrostatic force, F = `k(Q_(1)Q_(2))/r^(2)`
`=9 xx 10^(9) xx (2 xx 10^(-7)xx 3 xx 10^(-7))/(30 xx 10^(-2))^(2)`
`=6 xx 10^(-3)N`
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