A 100mH inductor, a 25μF capacitor and a 15Ω resistor are connected in series to a 120V, 50Hz ac source. Calculate current at resonance
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Explanation:
(a) Reason occurs when X
C
=X−L
∴z=15Ω
(b)I=
R
V
=
15
120
=8A
(c)X
C
=X
L
ω
C
1
=ω
L
ω
2
=
LC
1
ω=
LC
1
f=
LC
2π
×
2π
1
=100Hz
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