The Study of Voltage Resonance în RLC Series Circuits

The Study of Voltage Resonance in RLC Series Circuits

The scheme of the circuit used during the experiment is attached to the report.

Appliances list:

- AT - adjustable autotransformer, ATR 8 type;

- A - ferromagnetic ammeter, 2-10 A;

- V1,V2 - ferromagnetic voltmeters with multiple scales;

- R0 - 10 to max 20© rheostat;

- C - capacitor;

- I1 - bipolar switch;

- I2 - unipolar switch;

- K - unipolar switch.

Work purpose:

1) By alimenting the circuit with a voltage U, such that the maximum current would be I0 H 1.7A, the reactance of the coil modifies from the value (the core is completely introduced) to the minimum value, for the values of the current of 0.2, 0.4,…, 1.6; I0 = Imax; 1.6,…, 0.4, 0.2 by measuring the values of the voltage at the terminals of the coil and of the capacitor, in the following cases:

10) R0 short-circuited (R0 = 0, the voltage supply U1 H 10V)

20) R0 in the circuit (R0 ` 0, U2 H 30V or whatever necessary value such that I02 H I01)

2) For the measuring done at the point 1) it will be computed the amounts indicated in the table and it will be drawn the variation graphs I = I(XL), UL = UL(XL), Uc = Uc(XL), Æ = Æ(XL), for both cases 10 and 20 on the same graph.

3) It will be drawn at scale the phase diagrams of the voltages (it is recommended the scale 25V/1cm) for both cases 10 and 20 corresponding to a measurement in an inductive regime, at resonance, respectively to a measurement done in a capacitive regime.