Facts about parallel plate capacitors. For each statement, select \"True\" or \"
ID: 1354268 • Letter: F
Question
Facts about parallel plate capacitors. For each statement, select "True" or "False".
1. Adding a dielectric between the plates of an isolated air-filled charged capacitor decreases the energy stored in the capacitor.
2. The charges on the two plates of a capacitor are equal in magnitude and sign.
3. The capacitance of a device enables it to store energy.
4. Charge is stored in the dielectric medium between the plates of a capacitor.
5. The capacitance of a parallel plate capacitor is directly proportional to the separation of the plates.
Explanation / Answer
1. False, E = 0.5*C*V2, C = (dielectric permittivity)*A/d . Thus adding a dielectric increases energy as the pervittivity of all other medium is greater than air.
2. False. The charge on the two plates of a capacitors are equal in magnitude but different in sign.
3. True. Energy = 0.5 CV2
4. False. The charge is stored on the plate due to the potential difference between the plates.
5. False. C = (dielectric permittivity)*A/d ; where d = separation of plate.Thus, capacitance of a parallel plate is indirectly proportional to the separation of the plates.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.