Summary Electric Circuits IEB Matric Notes

ElectricCircuits-

Ohm's Law : The current
through a conductor is directly proportional to the potential difference across the


conductor at constant temperature


·
Ammeters
Measure (1)
-


current


Neglible resistance
-




-


Connected in Series




·

Voltmeters
-


Measure potential difference (VI

High
-


resistance

-

Connected in parallel



Potential difference Work done unit
:
per positive charge

Current Rate of flow of
:
charge

Series Circuit
------



R, Ra Rs

Current
·

is constant Vi
Vz
3


Votal V, Vz + Va
·

= +


·

Rtotal = R, + R2 + Ry




Parallel (iscuit
Identica resistorin. =ni
i
-




-




Current
·
------------------
is divided

Resistance
·

:



I I

i
=

R, "in 3 *


·
Resistors are current dividers



I
I tot .
Ry
T x =
Ri
-



Rx
Itotal


E-
R2