Step 1
Charging Current Starts
When the source is connected, electrons move in the external wire and charging current flows for a short time.
Circuit Element Explanation
Capacitor
A capacitor stores energy between two plates and does not like sudden voltage changes.
Back to Circuit ElementsExplanation
- It stores charge when voltage is applied.
- It is used in filters, timing circuits, coupling, and power supply smoothing.
- In DC, it charges first and then behaves almost like an open path.
Formula
Q = CV
- Q is the charge stored on the plates.
- C is the capacitance.
- V is the voltage across the capacitor.
Key Idea
A capacitor stores voltage energy and resists sudden voltage changes.
Visual Explanation Steps
Show charge accumulating on opposite plates while current fades after charging and the electric field glow builds between the plates.
Step 2
Charges Collect On Plates
Opposite charges accumulate on the two capacitor plates. Charge does not cross the insulating gap.
Step 3
Electric Field Builds
As charge increases, the electric field between the plates becomes stronger and energy is stored.
Step 4
DC Current Stops
After charging, the capacitor behaves like an open circuit for DC, so current fades to zero.