- #1

LCSphysicist

- 636

- 153

- Homework Statement:
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- Relevant Equations:
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I have been studying electronical circuit. In general, it is not difficult and is more about to solve EDO. The main problem is, really, the signs.

See as follows:

$$V_{L} = L dI/dt, V_{c} = +- Q/C$$ ?

Should i put a minus sign there? Or shout i maintain the signs? When do i know what sign to use? Even about the voltage dro pacross the inductor, couldn't it be ##V = -L dI/dt##?

See as follows:

Should i put a minus sign there? Or shout i maintain the signs? When do i know what sign to use? Even about the voltage dro pacross the inductor, couldn't it be ##V = -L dI/dt##?