Change the chapter
Question
If $0.625 \times 10^{20}$ electrons flow through a circuit each second, what is the current in the circuit?
Question by OpenStax is licensed under CC BY 4.0.
Final Answer

$10 \textrm{ A}$

Solution Video

OpenStax College Physics Solution, Chapter 20, Problem 3 (Test Prep for AP® Courses) (0:28)

Sign up to view this solution video!

View sample solution

Calculator Screenshots

OpenStax College Physics, Chapter 20, Problem 3 (AP) calculator screenshot 1
Video Transcript
This is College Physics Answers with Shaun Dychko. To figure out the current in the circuit, we need to convert this number of electrons into number of coulombs. So we multiply the number of electrons by the charge per electron and divide by the time which we're told is one second. So we have 0.625 times ten to the twenty electrons multiplied by the elementary charge of 1.6 times ten to the minus nineteen coulombs per electron and that gives us ten amps is the current.