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Voidbane
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Homework Statement
In an oscillating circuit, the capacitance is 2 microfarads and the maximum voltage at the clamps is 5V.
Find out
1:the maximum energy of the magnetic field.
2:energy of the mag field when the voltage of the capacitor is 3V.
Homework Equations
The Attempt at a Solution
First I transformed microfarads in farads.
2 microfarads= 2*10^-6 farads.
There isn't any mention of resistance, and it is said that it's an oscillating circuit, so i assumed that resistance is 0.
If R=0 => (CU^2)/2 = (LI^2)/2 => 2 * 10^-6 * 9
so the energy of the mag field when the voltage is 3V is 10^-6 * 9
The max energy of the magnetic field is 1/2 * CU^2 =10^-6 * 25
I managed to come to these results by using various bits from others problems in my notebook, but I'm pretty sure they're wrong.