Two positive point charges and are placed apart on a straight line

PHYSICS · Single correct · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two positive point charges

q_1

and

q_2

are placed

20\,\text{cm}

apart on a straight line. The point where a positive test charge experiences zero net force lies

12\,\text{cm}

from

q_1

along the line joining them and between the charges. What is the ratio

q_2/q_1

? (a)

2:3

(b)

9:4

(c)

4:9

(d)

3:2