Flashcards
Capacitance
Cards in this deck (18)
- 1CapacitorCapacitor: An electrical device which is used to store energy in the form of an electric field.
- 2CapacitanceCapacitance: Charge stored per unit potential applied.
C=Q/V - 3Unit of capacitanceFarad
(1 F is a huge amount of capacitance) - 4DependencyCapacitance is not dependent on charge or potential difference..
It is dependent on the symmetry of the capacitor. - 5Types Of Capacitors1] Spherical
2] Cylindrical
3] Parallel Plate - 6Spherical Capacitors(i) Isolated Spherical Conductor
(ii) Concentric Spherical Conductors - 7Isolated Spherical ConductorC = (1/k)R = (4piEo)R
- 8Concentric Spherical ConductorsC = ab/k(b-a) = 4piEo.ab/(b-a)
where a = radius of the inner sphere
b = radius of the outer sphere - 9Cylindrical CapacitorC/L = 2piEo/ ln(b/a)
a= radius of inner cyl.
b= radius of outer cyl. - 10Parallel Plate CapacitorC = AEo/d
Plate area= A
Plate separation= d - 11Energy stored in a capacitor (U)U = (1/2).CV^2
= (1/2).QV
= (1/2).(Q^2/C) - 12Energy Density of an Electric fieldEnergy stored per unit volume in an electric field.
- 13Energy density (u)u = U/Ad = (Eo. E^2)/2 = dU/dV
Eo= permittivity of free space
E= Electric field - 14Transient StateTransient state: the state in which charge flows from the battery to the capacitor charging the capacitor in the process.
- 15Steady StateSteady state: The current in the circuit becomes zero as the potential of the capacitor and that of the battery becomes equal.
- 16Heat dissipated in charging of a capacitorHeat Generated = (1/2)(CV^2)
where V is the voltage of the battery and C is the capacitance - 17Series Combination of Capacitors
- 18Parallel Combination of Capacitors
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- XII Physics Flashcards on Capacitance, created by Mugdha Deshpande on 27/06/2022.
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- Mugdha Deshpande
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