Question

Two positive charges of $1\mu C$ and $2\mu C$ are placed 1 m apart. the value of the electric foeld in N/C are the middle point of theline jioning the axis will be:

• A. $10.8\times {10}^4$
• B. $3.6\times {10}^4$
• C. $1.8\times {10}^4$
• D. $5.4\times {10}^4$

Answer 1

The correct option is A $10.8\times {10}^4$

Two positive charges of $1\mu C$ and $2\mu C$

$F_1=F_2$ (According to coulomb's law)

or, $\frac{1\times 9}{{\left(0.5\right)}^2}=\frac{2\times 9}{{\left(0.5\right)}^2}$

or, $9=10.8\times {10}^{4}C$