I keep getting “Capacitance” questions wrong in Electrostatics. What's the trap?
forgetting a dielectric increases capacitance.
The usual trap: forgetting a dielectric increases capacitance. How to avoid it: closer, larger plates (and a dielectric) store more charge. Go back to the definition — a capacitor's ability to store charge per volt, C = Q/V; for parallel plates C = ε₀A/d.
Key point
Capacitance
Common mistake
forgetting a dielectric increases capacitance.
Memory tip
closer, larger plates (and a dielectric) store more charge.
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