The sum of two point charges is 7uC . They repel each other with a force of 1N when kept 30 cm apart in free space. Calculate the value of each charge.
A. 5 × 10-6C , 2 × 10-6C
B. 3 × 10-6C , 4 × 10-6C
C. 7 × 10-6C , - 2 × 10-6C
D. 10 × 10-6C , - 3 × 10-6C