circuit called impedance
and given the symbol Thus impedance the combined opposition to
current flow the resistance, inductive reactance and capacitive reactance
of the circuit and can calculated from the formula:
Z )
Ω
or
Z
V
I
T
T
Definition
The total opposition current flow in
an a.Baisc Electrical Installation Work
196
Capacitive reactance (XC) the opposition a.2.7
Impedance
The total opposition current flow a.
Example
Calculate the reactance 150μF capacitor and 0. 10.
.c. causes the current the circuit lead ahead the voltage,
as shown Fig.c. current capacitive
circuit.c. given the formula:
X
fC
C )
1
2π
Ω
where and are defined before and the capacitance the circuit.
∴ Ω
XL 3.05H inductor they were separately
connected the 50Hz mains supply.142 50Hz 150 F
21.142 50Hz 0.c.
It can also expressed as:
X
V
I
C
C
C
Definition
Capacitive reactance (XC) the oppo-
sition a.2
Ω
For inductive reactance:
X fL
L 2π
where 50Hz and 0. circuit called impedance and
given the symbol Z.
For capacitive reactance:
2
C
X
fC
1
π
where 50Hz and 150μF 150 106
F.05H. current capaci-
tive circuit.05H 15.
∴ 6
1
2 3. causes the current the cir-
cuit lead ahead the voltage
