Modul Prinsip Amperemeter dan Voltmeter dalam Arus Searah (Bagian 3)

Summary

This video explains the procedures for an experiment involving an ammeter and voltmeter in DC circuits. It covers three main objectives: determining the relationship between voltage, current, and resistance, and measuring resistance in both the ammeter and voltmeter. The experiment is carried out using two methods: one for measuring voltage and current simultaneously, and the other for measuring resistance without a bench resistor. It also includes step-by-step instructions for calculating results, creating graphs, and comparing experimental data with reference values to assess errors. The video ends with a guideline for reporting the experiment’s results.

Takeaways

• 😀 The experiment focuses on the principles of ammeters and voltmeters in DC (direct current) circuits.
• 😀 The goal is to determine the relationship between voltage, current, and resistance through two measurement methods.
• 😀 The first method involves measuring voltage and current simultaneously, varying the bench resistance and calculating voltage and current for each variation.
• 😀 Two graphs are created: one for voltage vs. resistance and another for current vs. resistance.
• 😀 The second method involves measuring the resistance of the ammeter and voltmeter by varying voltage and using a multimeter to record values.
• 😀 For ammeter measurement, a linear regression is performed on the voltage vs. current graph to calculate resistance and error.
• 😀 Similarly, for voltmeter measurement, a linear regression is used on the voltage vs. current graph to determine the resistance and error.
• 😀 The third part of the experiment involves measuring the resistance of the ammeter and voltmeter with the bench resistance included in the circuit.
• 😀 In the ammeter portion of the third experiment, the bench resistance is varied, and current is measured to determine the resistance from the regression of the graph.
• 😀 In the voltmeter portion of the third experiment, the voltage drop across the bench resistance is measured and used to calculate resistance, again through a regression analysis.

Q & A

What is the main objective of the experiment discussed in the script?

The main objective is to determine the relationship between voltage, current, and resistance using two methods of measurement, and to measure resistance in both the ammeter and voltmeter.

What equipment is used in the second model experiment?

The equipment includes a DC ammeter, a DC voltmeter, a variable DC power supply, a bench resistor, a rheostat, a digital multimeter, and several cables.

How is the first experiment in Model 2 conducted?

In the first experiment, the current and voltage are measured simultaneously for different variations of the bench resistor, with calculations recorded in a table. Two graphs are created: one for voltage vs. resistance, and another for current vs. resistance.

What is the procedure for the second experiment involving the ammeter?

The voltage from the power supply is varied in five steps, and current is measured using the ammeter and a multimeter. The results are tabulated, and a graph of voltage vs. current is plotted. Linear regression is used to calculate resistance based on the gradient of the regression line.

How is resistance measured using the voltmeter in the second experiment?

Similar to the ammeter experiment, the voltage is varied in five steps, and current is measured with a multimeter. The results are tabulated, and a voltage vs. current graph is plotted. Linear regression is applied to calculate the resistance.

What is the focus of the third experiment involving both the ammeter and voltmeter?

The third experiment focuses on measuring the resistance in the ammeter and voltmeter while varying the bench resistor. The procedure involves measuring the voltage and current, creating regression models, and calculating the resistance.

How is the bench resistor varied in the third experiment with the ammeter?

The bench resistor is varied in five steps, and measurements for current are taken under each variation. A graph is then created to show the relationship between bench resistance and current, and the resistance is calculated using linear regression.

What is the approach for measuring the voltmeter in the third experiment?

In the voltmeter experiment, the bench resistor is varied in five steps, and the voltage is measured both with and without the bench resistor. The results are used to create a graph of bench resistance vs. the change in voltage, from which the resistance is calculated using regression analysis.

How is the error (or uncertainty) calculated for the experiments?

The error is calculated by comparing the experimental value of resistance with the reference value using the formula: (experimental value - reference value) / reference value * 100%.

What is the purpose of using regression analysis in these experiments?

Regression analysis is used to establish the relationship between measured variables (voltage, current, and resistance), allowing for the calculation of resistance values from the data, and assessing the accuracy of the experimental results.