NSEP · Physics · Electrostatics
Parallel-plate capacitor, dielectrics, energy stored and combinations.
Test yourself on Capacitance
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Q1 · Capacitance · MEDIUM
A parallel plate capacitor with air between the plates has capacitance C. A dielectric slab of dielectric constant K and thickness equal to half the separation between the plates is introduced between the plates. What is the new capacitance?
Q2 · Capacitance · EASY
A parallel plate capacitor with plate area A and separation d is filled with a dielectric of dielectric constant K. What is the capacitance of this capacitor?
Q3 · Capacitance · MEDIUM
A parallel plate capacitor is charged to a potential difference V and then disconnected from the battery. If the separation between the plates is doubled, what happens to the energy stored in the capacitor?
Q4 · Capacitance · EASY
A capacitor of capacitance 10 μF is charged to a potential difference of 100 V. It is then disconnected from the battery and connected across another uncharged capacitor of capacitance 40 μF. What is the final potential difference across the combination?
Q5 · Capacitance · MEDIUM
A parallel plate capacitor has plate area A and separation d. It is filled with two dielectric slabs of equal thickness d/2, with dielectric constants K₁ and K₂ respectively. What is the capacitance of this arrangement?