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