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Capacitance and Dielectrics (Capacitors and Capacitance (Capacitor:device…
Capacitance and Dielectrics
Capacitors and Capacitance
Capacitor:device that stores electric potential energy and electric charge.
Two conductors separated by an insulator form a capacitor.
The net charge on a capacitor is zero.
To charge a capacitor -| |-, wires are connected to the opposite sides of a battery. The battery is disconnected once the charges Q and –Q are established on the conductors. This gives a fixed potential difference Vab= voltage of battery.
Capacitance:constant equal to the ratio of the charge on each conductor to the potential difference between them.
abV Q C=Units:1 Farad (F) = Q/V = C2/J = C2/N m
Capacitors in Series and Parallel
Energy Stored in Capacitors and Electric-Field Energy
Dielectrics
Non-conducting materials between the plates of a capacitor. They change the potential difference between the plates of the capacitor.
The dielectric layer increases the maximum potential difference between the plates of a capacitor and allows to store more Q.
Dielectric breakdown: partial ionization of an insulating material subjected to a large electric field.
References
hyperphysics.phy-astr.gsu.edu/hbase/electric/dielec.html
https://physics.info/dielectrics/
https://www.slideshare.net/MariaRominaAngustia/capacitance-and-capacitor-67282041
NAME: PRIYAA A/P NANDAGOPAL
NO.IC: 001218010696
MATRIC NO: A19SC0350
