Two point charges of and are placed 30 cm apart in air

PHYSICS · Subjective · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two point charges of

+4\,\mu\text{C}

and

+1\,\mu\text{C}

are placed 30 cm apart in air. Calculate the distance from the

+4\,\mu\text{C}

charge along the line joining them where a small positive test charge would experience zero net electrostatic force.