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Results tagged with capacitor
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user 117580
A fundamental electronic component that stores energy in an electric field, commonly used in filtering applications.
0
votes
Voltage vs frequency in RLC circuit
equations that describe voltage-current relationship for inductors and capacitors:
$$ v_L(t) = L \frac{d}{dt} i_L(t), \qquad i_C(t) = C \frac{d}{dt} v_C(t), $$
where L and C subscripts denote inductor and capacitor … The graph that you posted shows how voltage amplitude on inductor and capacitor depends on the frequency. …
- 1,633
3
votes
Accepted
How do RC delay circuits work?
In this case, voltage increases on the capacitor at finite rate determined by R1, R2, and C. … When breakdown occurs, some energy from the capacitor is transferred to the neon lamp at the rate determined by resistance between capacitor and neon lamp. …
- 1,633
4
votes
Accepted
Can polarized capacitors be used for negative voltage generation?
If you reverse polarity, the polarized capacitor will most probably blow. That said, the capacitor doesn't know what is "negative voltage". As long as \$V_+\$ is higher than \$V_-\$, you're okay. …
- 1,633
2
votes
do I need a current source to load an electrolytic capacitor?
Please be careful - if you place a capacitor in parallel to a voltage source, a very high current might flow into capacitor, since for stepwise voltage change, the capacitor current is determined by: … $$I_C = \frac{\Delta V}{R} \exp\left(-\frac{t}{T}\right), \quad T=R\cdot C ,$$
where \$ C \$ is the capacitance of the capacitor, and \$ R \$ is its ESR (usually around \$20-50~\text{m}\Omega\$). …
- 1,633