Question

he charges of a system are +7 C, + 4 C, - 5C and -9 C respectively. What would be the net charge of the system? *
(d) - 25 C
(a) + 3 C
(b) - 3 C
(c) + 25 C​

Answer 1

so how if we simply add all of them

7C + 4C + (-5C) +(-9C)

11C -14C

-3C

so option b) is answer