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Old Sep 29th 2009, 07:39 PM   #1
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Exclamation circuit

Consider the RC circuit in the figure below. The switch was at position a for a long period of time and it is suddenly switched to position b at time t = 0.




What is Vc at time t = 2.00 ms?
Use the following data : R = 471.5 Ω, C = 4.00 μF, Vb = 3.25 V.

What is the total energy dissipated by the resistor R after the switch is thrown?

Using the same data as before, consider the case when the switch is in position b for a long time, and then it is switched to position a at time t = 0. What is Vc at time t = 2.00 ms?

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Old Sep 29th 2009, 07:50 PM   #2
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Originally Posted by missyc8 View Post
Consider the RC circuit in the figure below. The switch was at position a for a long period of time and it is suddenly switched to position b at time t = 0.




What is Vc at time t = 2.00 ms?
Use the following data : R = 471.5 Ω, C = 4.00 μF, Vb = 3.25 V.

What is the total energy dissipated by the resistor R after the switch is thrown?

Using the same data as before, consider the case when the switch is in position b for a long time, and then it is switched to position a at time t = 0. What is Vc at time t = 2.00 ms?

You forgot to attach the picture.
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Old Sep 30th 2009, 08:46 AM   #3
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oops

here is the picture
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circuit-prob01a_rccircuit.gif  
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Old Sep 30th 2009, 09:19 AM   #4
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When they say
The switch was at position a for a long period of time and it is suddenly switched to position b at time t = 0.
I suppose they mean the capacitor was fully charged and then suddenly they switched the switch. Do you know what happen in the circuit when they do so?
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