PHYSICAClass 12 Physics simulations · Electrostatic Potential and Capacitance
Spherical capacitor
Two concentric conducting spheres store charge. Change their radii and the dielectric between them.
What to notice
Bringing the spheres closer (b → a) raises the capacitance sharply.
Key relation
C = 4πε₀κ ab / (b − a)
Try this
Make b very large. Compare with the isolated-sphere result 4πε₀a.
What you can change
- Inner radius a: 1 to 20 cm
- Outer radius b: 2 to 40 cm
- Dielectric constant κ: 1 to 10
- Voltage: 10 to 1000 V
More in Electrostatic Potential and Capacitance
- Energy stored in a capacitor
- Parallel plate capacitor
- Capacitors in series and parallel
- Sharing charge between capacitors
- Partially filled capacitor
- Equipotentials around a point charge
- Dielectric in an isolated capacitor
- Charging an RC circuit
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