A negatively charged balloon has 3.1 μC of
charge.
How many excess electrons are on this bal-
loon?
Answer in units of electrons.
To find the number of excess electrons on the balloon, we can use the equation:
Charge = Number of electrons × Elementary charge
Where,
Charge is the given charge on the balloon (3.1 μC).
Elementary charge is the charge of a single electron (1.6 × 10^-19 C).
To convert the charge from microcoulombs (μC) to coulombs (C), we need to multiply it by 10^-6.
Let's calculate the number of excess electrons on the balloon:
Number of electrons = Charge / Elementary charge
First, convert the charge from microcoulombs to coulombs:
Charge = 3.1 μC × 10^-6 = 3.1 × 10^-6 C
Now, plug in the values into the equation:
Number of electrons = (3.1 × 10^-6 C) / (1.6 × 10^-19 C)
Divide the numbers:
Number of electrons ≈ 1.94 × 10^13 electrons
Therefore, there are approximately 1.94 × 10^13 excess electrons on the balloon.