THIS USER ASKED 👇

A+29 nc charge is at the origin. how much farther from the charge is the 2000 v equipotential surface than the 3000 v surface?

THIS IS THE BEST ANSWER 👇

The general formula for calculating a charge is given by:
V = kq / r where V = Equipotential, k = Coulomb constant = 9 * 10 ^ 9 Nm ^ 2C ^ -2 and q = Charge in coulombs, and r = distance from the equipotentiality surface.

Charge = +29 nc = 29 * 10 ^ -9 C.

Ag 1000 V, r = kq / V = ​​(9 * 10 ^ 9 * 29 * 10 ^ -9) / 1000 = 0.261 m
Ag 3000 V, r = kq / V = ​​(9 * 10 ^ 9 * 29 * 10 ^ -9) / 3000 = 0.087 m

A surface of 1000 V (2.61-0.87) m is longer than a surface of 3000 V from the charge.

That is, 0.261-0.087 = 0.174 m