Resistors series and parallel
In electrical circuit resistors may connected series, parallel, or
in various combinations series and parallel connections.
Series-connected resistors
In any series circuit current will flow through all parts the circuit a
result the potential difference supplied battery VT.1) have:
V V
T 3
∴ 3
R1
V1
I
R2 R3
V2
VT
V3
FIGURE 5.1
A series circuit. Therefore, say
that series circuit the current common throughout that circuit. From Ohm’s law know that
V and therefore
Total voltage
Voltage drop across is
Volt
T T
V R
R 1
a
age drop across is
Voltage drop across is
R R
R V
2 2
3 R3
(5.1, there will voltage drop across that resistor
whose value will determined the values and since from Ohm’s
law The sum the individual voltage drops, V1, and for
example Fig.1)
Let call the total circuit resistance RT.1, will equal the total voltage VT.
When the current flows through each resistor the circuit, R1, and R3
for example Fig. 5.Basic scientific concepts electrotechnology
103
steel’s resistance corrosion.
We can summarize these statements follows.2) into equation (5.
.2)
We are looking for expression for the total resistance any series circuit
and, substitute equations (5. 5. For any series circuit, is
common throughout the circuit and
V V
T (5. Conduit, trunking, tray, SWA, outside lumi-
naires and electricity pylons are made galvanized steel
