A sphere has a negative charge of 6.4 × 10-7 coulomb. The approximate number of electrons that must be removed to make the sphere neutral is
A) 1.6 × 10-8.
B) 6.4 × 1026 .
C) 9.8 × 103.
D) 4.0 × 1012 .

Question

Quizplus · Accepted Answer

The charge of one electron is approximately 1.6 × 10^-19 coulombs. To find the number of electrons, divide the total charge by the charge of one electron: (6.4 × 10^-7) / (1.6 × 10^-19) = 4.0 × 10^12.

A Sphere Has a Negative Charge of 6