Question

calculate net electric field strength at (A) due to two charges of + 1 UC and -1 uc at B and C of equilateral triangle of side 1 metre​

Answer 1

Explanation:

Angle made by the net force is 130 degree

$net \: force \: is \: \sqrt{k \times 1 \div 1 + k \times 1 \div 1 + 2kq \div 1 \times - 1 \div 2 } \\ = k \: = 9 \times {10}^{9}$

Hope it helps!!