Praktikum Fisika Dasar || ARUS BOLAK BALIK

Summary

In this physics experiment, the focus is on alternating current (AC), specifically sinusoidal AC, and the concepts of resonance. The experiment involves using an oscilloscope, signal generator, and various components like resistors, inductors, and capacitors. The process includes measuring key parameters such as frequency, voltage, and impedance, followed by resonance experiments with RLC circuits. The setup is carefully explained, and calculations are shown for frequency, impedance, current, and voltage, with a focus on resonant frequencies. The results from multiple tests are analyzed to determine the resonance characteristics of the system, providing practical insights into AC behavior.

Takeaways

• 😀 The experiment focuses on alternating current (AC) and aims to measure various parameters of AC circuits.
• 😀 The experiment involves using an oscilloscope and signal generator to measure waveform characteristics like frequency and amplitude.
• 😀 The primary goal of the experiment is to determine the properties of AC, including calculating resonant frequency and impedance in an RLC circuit.
• 😀 Key equipment used in the experiment includes a signal generator, oscilloscope, resistor, inductor, capacitor, and connecting cables.
• 😀 The procedure includes setting up the RLC circuit and calibrating the oscilloscope before starting measurements.
• 😀 The signal generator's frequency is adjusted using the frequency button, and amplitude is set to a value like 5V.
• 😀 During data collection, the oscilloscope's display is calibrated to show sinusoidal waveforms, which are used to measure peak-to-peak voltage and frequency.
• 😀 The experiment requires calculating the resonant frequency and impedance for different frequencies, using formulas for inductive reactance (XL) and capacitive reactance (XC).
• 😀 Calculations of VRMS and impedance are crucial, with the VRMS value calculated using a formula involving the square root of the AC power.
• 😀 The final analysis includes comparing experimental results with theoretical values, calculating current through the circuit, and determining the accuracy of the measurements using error analysis.

Q & A

What is the primary objective of this experiment?

The primary objectives of the experiment are: 1) to determine the quantities in alternating current (AC), 2) to measure values in AC, and 3) to conduct a resonance experiment in AC.

What equipment is required for the alternating current experiment?

The required equipment includes a signal generator, an oscilloscope, connecting cables, a resistor, an inductor, and a capacitor.

How do you calibrate the oscilloscope?

To calibrate the oscilloscope, you press the 'Auto' button and wait a few moments until a line appears, indicating the device has been calibrated.

How do you set the frequency on the signal generator?

To set the frequency on the signal generator, press the frequency button, enter the desired frequency (e.g., 10,000 Hz), and select the appropriate unit (e.g., kHz or MHz).

What is the procedure to measure the peak-to-peak (Fpp) value using the oscilloscope?

To measure Fpp, first position the oscilloscope to display the waveform. Then, count the number of grid squares between the peaks of the waveform and calculate the peak-to-peak value based on the number of squares and the scale.

How do you determine the impedance in the experiment?

The impedance (Z) is calculated using the formula Z = √(Xc² + XL²), where Xc is the capacitive reactance, and XL is the inductive reactance, both of which are calculated separately based on the experimental data.

What is the formula used to calculate the Vrms (Root Mean Square Voltage)?

The formula for Vrms is: Vrms = 1/√2 × Fpp, where Fpp is the peak-to-peak value of the voltage.

How is the total current (Itotal) calculated in this experiment?

The total current (Itotal) is calculated using the formula Itotal = Vrms total / Z, where Vrms total is the root mean square voltage, and Z is the impedance.

What is resonance in an AC circuit, and how is it observed in this experiment?

Resonance occurs in an AC circuit when the inductive reactance (XL) and capacitive reactance (Xc) are equal, resulting in maximum current flow. In this experiment, resonance is observed by adjusting the frequency and observing changes in the waveform at specific frequencies.

How do you calculate the theoretical values of the resonance frequency (fR) and the inductive and capacitive reactance (FL and FC)?

The theoretical values are calculated using the following formulas: fR = (Vtotal × Er) for the resonance frequency, FL = (Itotal × L) for the inductive reactance, and FC = (Itotal × C) for the capacitive reactance, where Er, L, and C are the experimental values for resistance, inductance, and capacitance, respectively.