A total charge of 25 mC passes through a cross-sectional area of a nichrome wire in 10 s. How many electrons pass through the cross-sectional area in 16 s?
Choose one answer.
a. 2.5 x 1017 electrons
b. 2.5 x 1019 electrons
c. 2.5 x 1016 electrons
d. 2.5 x 1021 electrons
the answer is (a) im taking a test with this question
To find the number of electrons passing through the cross-sectional area in 16 seconds, we need to use the formula:
Number of electrons = Total charge / Charge of each electron
Given that the total charge passing through the cross-sectional area is 25 mC (25 milliCoulombs), and the charge of each electron is approximately 1.6 x 10^-19 C,
Number of electrons = (25 x 10^-3 C) / (1.6 x 10^-19 C)
Using this calculation, we find that the number of electrons passing through the cross-sectional area is approximately 1.5625 x 10^17 electrons.
Therefore, the closest answer is option a. 2.5 x 10^17 electrons.