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NAVSPROUT LABS · A LITTLE CURIOSITY. A COMPLETE CIRCUIT.

Combining capacitors

Parallel capacitors share voltage and their capacitances add. Series capacitors carry equal incremental charge and combine through reciprocal capacitances.

48 hands-on lessons7 learning pathsFree · no hardware neededOpen the workbench ↓
ELECTRONICS 101Discover · Experiment · Build
Capacitors0 / 9
27 / 48 · Capacitors
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5.0 mA

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SUPPLY5.00 V
CURRENT5.00 mA
OUTPUT0.00 V
TIME0.00 s
Live curve
Calculated outputMarker = current time
ONE QUICK CHECK

Two equal capacitors in series give…

Capacitors · FIELD NOTES

Understanding combining capacitors

Parallel capacitors share voltage and their capacitances add. Series capacitors carry equal incremental charge and combine through reciprocal capacitances.

1. Set up the experiment

Choose series or parallel, change the second capacitor, and compare equivalent capacitance and the resulting RC time constant.

2. Connect the result to the equation

C_parallel = C1+C2; C_series = C1C2/(C1+C2)

Change one parameter at a time and keep the others fixed. Read the signed output and current, then use the curve to distinguish a steady relationship from a changing transient.

Initial supply
5.00 V
Initial current
5.000 mA
Initial output
0.000 V

3. Notice the limits

For series capacitors, voltage need not divide equally when capacitances differ. Real leakage and voltage ratings also matter.

Circuit reference diagram
SourceSourceR1R1C1C1C2C2Push buttonPush button5 V · 5 mA

Continue this learning path

Why it’s here

Electronics 101 makes a component change visible: an altered resistance changes a current, a capacitor changes a delay, and a sensor changes a decision. The course guide links each concept to its experiment.

  1. Open Ohm’s law and predict the effect of doubling the voltage.
  2. Change the control and compare the ammeter, curve and equation.
  3. Try RC charging and use the time constant to explain the curve.
  4. Return to the course guide to choose the next experiment.

Frequently asked questions

Can I use every experiment on NavSprout?

Yes. The course guides and workbenches run on NavSprout.

Are these circuit simulations exact?

They are analytic teaching models: ideal sources and switches, fixed diode drops, simple BJT gain and saturation, exponential RC behavior, and illustrative sensor curves. They are not a SPICE solver or construction verification.

Do I need hardware or a login?

No hardware or account is needed. The 3D view needs WebGL, while diagrams, controls and static lessons remain available as alternatives. Progress is stored in this browser and can be exported.

Which current direction is shown?

Moving markers represent conventional current, not electron drift. Their motion is illustrative and is not a measurement of charge velocity.

Model references and scope

Original NavSprout lessons use standard lumped-circuit relationships and explicitly simplified component models. Diagrams explain teaching topologies, while the breadboard probe explains socket continuity. The workbench is not a verified physical assembly plan.

OpenStax: resistor networks ↗OpenStax: RC circuits ↗BJT switching reference ↗
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