elips said:Well, Q = CV
Q= 10*10^-6*3V
Q=30µC
i = dq/dt
t= 30*10^-6/10*10^-6 Is it true?
Wc= 0.5*C*V^2
Wc= 0.5*10*10^-6*(3^2)
Wc= 4.5 × 10-5µJ Is it true?
I'm not really sure about my answers...
gneill said:I thought that the capacitor was 470µF?
Well, it's true that a the time required to move a charge Q with a constant current I is
t = Q/I
You'll want to straighten out your capacitor value in your calculation.
gneill said:I thought that the capacitor was 470µF?
Well, it's true that a the time required to move a charge Q with a constant current I is
t = Q/I
You'll want to straighten out your capacitor value in your calculation.
gneill said:Your methodology is okay, you just need to use the correct values.
Capacitor: 470µF charged to 330V at a rate of 10µA
(That's a pretty small current; it'll take a looong time to charge! You might want to confirm this value with the original problem text).
To charge a capacitor, you need to connect it to a power source, such as a battery or a power supply. The positive terminal of the power source should be connected to the positive terminal of the capacitor, and the negative terminal of the power source should be connected to the negative terminal of the capacitor. This will allow electric charge to flow into the capacitor, storing it and creating a potential difference across the capacitor's plates.
The time it takes to charge a capacitor depends on the capacitance of the capacitor and the amount of current flowing into it. This can range from a few milliseconds to several minutes. The equation Q=CV can be used to calculate the time it takes to charge a capacitor, where Q is the charge in coulombs, C is the capacitance in farads, and V is the voltage across the capacitor.
Yes, a capacitor can be overcharged if the voltage across it exceeds its rated voltage. This can cause damage to the capacitor or even lead to explosion in extreme cases. It is important to use a power source with the appropriate voltage for the capacitor being used, and to monitor the charging process to prevent overcharging.
No, a capacitor has a limit to the amount of charge it can store, which is determined by its capacitance. Once the capacitor reaches its maximum charge, it cannot store any more electric charge. Attempting to charge it beyond its limit can cause damage to the capacitor.
To discharge a capacitor, you can simply disconnect it from the power source. However, this may not completely discharge the capacitor, especially if it has a large capacitance. To fully discharge a capacitor, you can connect a resistor across its terminals. This will allow the charge to slowly dissipate through the resistor until the capacitor is fully discharged.