Calculating Current given the number of electrons and positive ions

  • #1

Homework Statement



In a fluorescent tube of diameter 3 cm, 10 *1018 electrons and 2.5 * 1018 positive ions (with a charge of +e) flow through a cross-sectional area each second. What is the current in the tube?


Homework Equations


Current is I = (delta Q)/(deta T)



The Attempt at a Solution



delta t is given as 1 second, but how do u calculate the change in charge given this information?
 

Answers and Replies

  • #2
Delphi51
Homework Helper
3,407
11
Use the charge on the electron. Note that the positive ions will go the opposite way to the electrons, so you must add the two currents.
 

Related Threads on Calculating Current given the number of electrons and positive ions

Top