Alternating CurrentHard
Question
In the AC circuit shown below, the supply voltage has constant rms value V but variable frequency f. At resonance, the circuit :
Options
A.has a current I given by I = 
B.has a resonance frequency 500 Hz
C.has a voltage across the capacitor which is 1800 out of phase with that across the inductor
D.has a current given by I = 
Solution
Resonance frequency f = 
= 500 Hz
At resonance Z = R
& I =
L & C are in out of phase.
= 500 Hz At resonance Z = R
& I =
L & C are in out of phase.
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