Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Intro. to Elect 06
CO1_Intro. to Elect. - Capacitance, Capacitors, & Field/Potential Apps - #6
| Question | Answer |
|---|---|
| Capacitance (Definition) | The ability of a system to store electric charge per unit potential difference. |
| Capacitance Formula | C = Q/V, where Q is charge and V is potential difference. |
| Unit of Capacitance | The farad (F), equal to coulomb per volt. |
| Parallel-Plate Capacitor (Definition) | Two parallel conducting plates separated by a small distance, storing charge. |
| Capacitance of Parallel-Plate Capacitor | C = ε₀A/d for vacuum; A is plate area, d is separation. |
| Effect of Dielectrics | A dielectric increases capacitance by reducing the electric field inside the capacitor. |
| Dielectric Constant (κ) | Ratio of capacitance with dielectric to capacitance without dielectric. |
| Capacitance with Dielectric | C = κ ε₀ A / d. |
| Electric Field in a Capacitor | E = V/d for a uniform field between parallel plates. |
| Energy Stored in a Capacitor | U = ½ C V². |
| Energy Density in Electric Field | u = ½ ε₀ E². |
| Charging a Capacitor | Work must be done to move charge onto the plates against the electric field. |
| Discharging a Capacitor | Stored energy is released as charges move and potential difference decreases. |
| Applications of Capacitors | Used in filters, timing circuits, energy storage, and smoothing voltage. |
| Potential and Field Relationship | Electric field points from high potential to low potential; magnitude is E = -dV/dx. |
Created by:
francisslavin001