an oil drop has a charge of 8.0 x 10^-19 C. How many excess electrons does the oil drop have?
To determine the number of excess electrons, we need to know the elementary charge, which is the charge of a single electron. The elementary charge is approximately 1.6 x 10^-19 C.
To find the number of excess electrons, we can divide the charge of the oil drop by the elementary charge.
Number of excess electrons = (Charge of the oil drop) / (Elementary charge)
Number of excess electrons = (8.0 x 10^-19 C) / (1.6 x 10^-19 C)
Number of excess electrons = 5
Therefore, the oil drop has 5 excess electrons.
To find out the number of excess electrons, we need to understand the charge of an electron. The charge on an electron is -1.6 x 10^-19 C.
The charge of the oil drop is 8.0 x 10^-19 C, which is a positive charge. This means that the oil drop has lost electrons and has an excess positive charge.
To find the number of excess electrons, we can calculate the ratio of the charge of the oil drop to the charge of a single electron.
Number of excess electrons = Charge of the oil drop / Charge of a single electron
Number of excess electrons = (8.0 x 10^-19 C) / (-1.6 x 10^-19 C)
Number of excess electrons = -5
Therefore, the oil drop has 5 excess electrons.
Divide that excess charge by the electron charge, e.
The answer should be 5 (electrons)