A 100 mH inductor, a 25 µF capacitor and 15 Q resistor are conn
120 V, 50 Hz AC source, calculate current at resonance.
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The current at resonance will be
The inductance of inductor = 100 mH
= 100 × 10⁻³ H
The capacitance of capacitor = 25μF
= 25 × 10⁻⁶ F
Voltage of the source = 120 V
Frequency of the source = 50 Hz
At resonance inductive reactance ( = ωL) and the capacitive reactance
(= 1/ωC) are same.
So, the impedance, Z =
Z = R [As = ]
Resistance (R) = 15 Ω
So, the current is = 120/15 A
= 8 A
The current at resonance is 8 A.
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