Question

Two charges 4×10^-9and -3×10^-9 Colomb are located at 0.1meters apart . At what charges is the electric potential zero

Answer 1

Answer:

0.057 meter from charge 4×10^-9 along the direction of line joining both the charges.

Explanation:

Equate the sum of the electric potential to 0

and let the distance be X meter from charge 4×10^-9 in left. now equate the sum

K4×10^-9/x+K(-3)×10^-9/0.1-x=0

4K×10^-9/x=3K×10^-9/0.1-x

4/x=3/0.1-x

cross multiply

0.4-4x=3x

0.4=7x

0.4/7=x

0.057meter =x

therefore at a distance of 0.057 meter from charge 4×10^-9 coulomb net electric potential is zero.

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