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