voltage drop

Thread Starter

myoplex11

Joined Oct 3, 2007
5
A 6V DC voltage source is connected across both a 5kohm resistor and a 10 nF capacitor in series. The voltage drop across the resistor is what?
 

Dave

Joined Nov 17, 2003
6,970
thanks but the time is not given
From the above equation the voltage across the resistor is a function of time, so it is pretty essential to the question - could it be asking you for the initial or final voltage across the resistor?

Dave
 

Dave

Joined Nov 17, 2003
6,970
it is the final voltage across the resistor
For the final voltage, and in the absence of a specific time, in the above equation use t = \(\infty\), therefore you get:

v(t) = 6*exp(-\(\infty\))

exp(-\(\infty\)) = 0, therefore in this ideal scenario the voltage across the resistor is 0V, i.e. the entire source voltage is across the capacitor.

Dave
 
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