Dimensional Analysis and units of voltage

  • Thread starter Nusc
  • Start date
  • #1
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Homework Statement



The first equation below has units of voltage.

Homework Equations



[tex]
V(t)=IR(1-e^{t/RC}) \rightarrow ln|IR - V(t)| = ln|IR|-t/RC
[/tex]

The Attempt at a Solution



the logarithm has units of voltage, but what does ln|IR| and ln|V| physically mean?
 

Answers and Replies

  • #2
753
2
The purpose of this question is that if you plot the natural logarithm of the voltage versus time, it should yield a straight line with slope -1/RC and intercept ln|V_c|.

From which you can determine the capacitance given a known resistance. Or maybe I should post this in the general physics forum?
 

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