Hi I have a fairly simple question, but it\'s crucial for a project I\'m doing..
ID: 1768151 • Letter: H
Question
Hi I have a fairly simple question, but it's crucial for a project I'm doing... I have an LRC circuit wired in series with one resitor, capacitor, and inductor. The voltage source is 8 Vrms with variable frequency.
My question is does the current in the circuit remain constant when the frequency varies? I believe that the voltage will vary, but I'm not sure on the current.
My professor has given an eqaution before where Vrms = Irms * Z, with Z being total impedance of the circuit. I think I realize how the impedance will change as the frequency changes, thus causing the voltage to change, but im not sure on current.
An explaination would be greatly appreciated! Also an explaination on phase angle I think would help me too. Thanks in advance!
Explanation / Answer
The voltage source is 8 Vrms with variable frequency.
Vrms = Irms * Z
Impedance gonna remain same though the voltage changes so Irms must also changes with respect to the voltage
If the voltage increases then the current increases and vice versa.,
With a constant current through a resistor the voltage drop across the resistor is independent of the frequency of the applied current.
With a constant current through an inductor the Voltage drop across the inductor increases with an increase in the frequency of the applied current.
With a constant current through a capacitor the Voltage drop across the capacitor decreases with an increase in the frequency of the applied current.