From
Ohm’s law:
R
V
I
R
R
( )
Ω
Definition
In any circuit, resistance defined as
opposition current flow.
Inductive reactance (XL) the opposition a.142 constant
f the frequency the supply
L the inductance the circuit by
X
V
I
L
L
L
R
Pure resistance
(R)
V and phase lags 90° leads 90°
Pure inductance
(L)
Pure capacitance
(C)
V
V
I
V V
I
I
I
I
L
V
I C
V
I
V V
I I
FIGURE 10.
. circuit, resistance only part the opposition cur-
rent flow. 10.2.c. circuit also cause an
opposition current flow, which call reactance.2
Voltage and current relationships resistive, capacitive and inductive circuits.
Definition
Inductive reactance (XL) the opposi-
tion a.c. given the formula:
X fL
L Ω
where
π 3.c. current inductive
circuit.c.Alternating current theory and electrical machines
195
Resistance
In any circuit, resistance defined opposition current flow. The inductance and capacitance a.
However, a. current inductive
circuit. causes the current the cir-
cuit lag behind the applied voltage. causes the current the circuit lag behind the applied voltage,
as shown Fig
