Subscribe TechModgy to learn about new technologies!

The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium of relative permittivity of 3a then electric potential at that point will be

A. 63 V

B. 21 V

C. 7 V

D. 42 V

Please do not use chat terms. Example: avoid using "grt" instead of "great".