Circuits 9.5: Additional Problem 3

 

Single battery (a)  Two batteries in series (b)

 

Description

You are given two situations to evaluate, one involves only one battery and the other involves two batteries in series. All batteries are identical and have identical internal resistances (not shown). Use the slider to vary the external resistance R

Question

What is the relationship between the two circuits regarding the current in the circuit and net internal resistance of the batteries?  

Answer

 i(a) = i(b) and rint (a) = 0.5 rint (b). 

Reference

See Giancoli-PA: 19-3, Giancoli-SE: 26-1.

Credits

Physlet problem authored by Morten Brydensholt and modified by Mario Belloni.

2000 by Prentice-Hall, Inc. A Pearson Company