Definition OF Capacitor
A capacitor is a two terminal electric device which stores
charge in an electric field.the effect of capacitor is called capacitance.a
capacitor is a component which is used to add capacitance in the circuit.
Charging Phenomena OF Capacitor
When a capacitor is added in any circuit or a battery an
electric field develops across the dielectric of the capacitors and the
capacitor starts its charging by collecting positive charges on one plate and the
negative charges on the other plate.
Capacitance is the ratio of the electric charge of each
conductor to the potential difference between them.
SI Unit
The SI unit of capacitor is Farad which is equal to one
coulomb charge of each conductor.
Operation
A capacitor consists of two conductors or plates which are
separated with insulator or non conductive material or with vacuum known as di
electric.According to coulombs law a charge on one conductor will expend a force
on the charge carriers to the other conductor by attracting unlike charges and
repelling like charges.As a result opposite charges induced on the surface of
the other conductor then the conductors hold equal and opposite on their
surfaces and the di-electric develops an electric field.Formula
A capacitor is defined as the ratio between the positive and
negative charges Q of each conductor and the voltage of the conductor V.
Q=C.V C=Q/V V=Q/C
Capacitors in parallel connection
In parallel connection of capacitors the following
conditions happened:
- · The value of applied voltage remains same
Vt = V1 = V2 = V3 = …….Vn
- · The capacitance's of capacitors added
Ceq=C1+C2+C3+……Cn
Capacitors in series connection
In series connection of capacitors the following conditions
happened:
- · The Value of of applied voltage are added together
Vt=V1+V2+V3+…..Vn
- · The value of capacitance is given below:
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