a small pith ball carries a charge of -1.3 uc. how many excess electrons does this represent?
Divide the net charge (-1.3*10^-6 C) by the charge of one electron (-1.6*10^-19 C)
To determine the number of excess electrons represented by a charge of -1.3 µC (microcoulombs), we need to use the elementary charge value.
The elementary charge is the fundamental unit of electric charge and is approximately equal to 1.602 x 10^-19 coulombs (C). This value represents the charge of a single electron.
Now, we can calculate the number of excess electrons using the formula:
Number of excess electrons = Total charge / Elementary charge
Substituting the given values, we have:
Number of excess electrons = -1.3 µC / (1.602 x 10^-19 C)
Calculating this, we find:
Number of excess electrons ≈ -8.111 x 10^12 electrons
Therefore, a charge of -1.3 µC represents approximately 8.111 x 10^12 excess electrons.
To determine the number of excess electrons represented by a charge of -1.3 μC (microcoulombs), we need to use the elementary charge, which is the charge of a single electron.
The elementary charge is approximately equal to 1.6 x 10^-19 C (coulombs). Therefore, we can set up a proportion to find the number of excess electrons:
-1.3 μC / 1 C = x / (1.6 x 10^-19 C)
Simplifying the above expression:
-1.3 x 10^-6 C / 1 = x / (1.6 x 10^-19 C)
Cross-multiplying:
-1.3 x 10^-6 C * (1.6 x 10^-19 C) = x * 1
Calculating:
-2.08 x 10^-25 C = x
Therefore, the charge of -1.3 μC represents approximately -2.08 x 10^-25 excess electrons.