A metal sphere has a charge of -6 µC. How many excess electrons are there on the sphere?
4x10^-13
10x10^13
4x10^13
10x10^-13
To find the number of excess electrons on the metal sphere, we need to use the elementary charge, which is the charge of a single electron. The elementary charge is approximately 1.6 x 10^-19 coulombs.
First, we convert the charge of the sphere from microcoulombs (µC) to coulombs (C). Since 1 µC is equal to 1 x 10^-6 C, the charge of the sphere is -6 x 10^-6 C.
Next, we calculate the number of excess electrons. We know that the charge of each electron is -1.6 x 10^-19 C. By dividing the charge of the sphere by the charge of each electron, we can find how many excess electrons there are:
Number of excess electrons = Charge of the sphere / Charge of each electron
= (-6 x 10^-6 C) / (-1.6 x 10^-19 C)
Using this equation, we can calculate the number of excess electrons.