Finding voltage and current expressions (capacitance)

  • Thread starter appleraja
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  • #1
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Homework Statement



The charge on a 2-microfarad capacitor is given by q(t)=10^-6 * sin(10^5*t) C find the dexpression for the voltage and current?

Homework Equations





The Attempt at a Solution


the answer is v(t)=0.5sin(10^5t) , i(t)=0.1cos(10^5t) i dont get how they found the answer
 

Answers and Replies

  • #2
998
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Note that q = Cv and i = [itex]\frac{dq}{dt}[/itex].
 
  • #3
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what im confused is when they say, charge is microfarad does that mean q=2x10^-6 or is the capacitor 2 microfarad meaning c=2x10^-6
 
  • #4
gneill
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what im confused is when they say, charge is microfarad does that mean q=2x10^-6 or is the capacitor 2 microfarad meaning c=2x10^-6

Capacitance is given in farads (microfarads in this case), while charge is given in coulombs (C).
 

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