Admitansi
Admitansi adalah listrik bolak-balik (yang berbentuk sinusoida). Lambang admitansi adalah Y dengan satuan Siemens . Jadi admitansi berlaku dalam suatu kalang (lingkaran arus) AC (alternating current ).
Y
=
I
V
S
i
e
m
e
n
s
{\displaystyle Y={\frac {I}{V}\;Siemens}
Admitansi adalah kebalikan dari impedansi , yaitu:
Y
=
1
Z
=
1
R
+
j
X
{\displaystyle Y={\frac {1}{Z}={\frac {1}{R+jX}
Y
=
R
R
2
+
X
2
−
j
X
R
2
+
X
2
=
G
+
j
B
{\displaystyle {\begin{aligned}Y&={\frac {R}{R^{2}+X^{2}-j{\frac {X}{R^{2}+X^{2}\\&=G+jB\\\end{aligned}
Disini konduktansi
G
=
R
Z
2
{\displaystyle G={\frac {R}{Z^{2}
B
=
−
j
X
Z
2
{\displaystyle B=-j{\frac {X}{Z^{2}
B
=
+
j
X
Z
2
{\displaystyle B=+j{\frac {X}{Z^{2}
Lihat pula
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