Question Detail
Question
How many electrons per second pass through a section of a conductor carrying a current of 0.70 A? (Based on Assignment 13.10)
Correct Answer
Option C is the correct answer.
Detailed Explanation
Current (I) is defined as the rate of charge flow, I = Q/t. The total charge (Q) is the number of electrons (n) multiplied by the charge of a single electron (e), so Q = ne. Therefore, I = ne/t. We want to find n/t (electrons per second). The charge of an electron e = 1.6 × 10⁻¹⁹ C. So, n/t = I/e = 0.70 A / (1.6 × 10⁻¹⁹ C/electron) = 4.375 × 10¹⁸ electrons/s.
Hint
Recall the fundamental relationship between current, charge, and the number of charge carriers. The charge of a single electron is a key constant here.