Three point charges are fixed collinearly in the order ,

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

Problem

Three point charges are fixed collinearly in the order

O

C

D

along a straight line. Charge at

O

+8\,\mu\text{C}

, at

C

-2\,\mu\text{C}

, and at

D

+8\,\mu\text{C}

. The separation

OC

30\,\text{cm}

and

CD

is also

30\,\text{cm}

. Determine all positions on this line, measured from

O

, where a small positive test charge would experience zero net electrostatic force.