Current, Voltage, Resistance, and Power

In this question, we selected mode D

This activity showed measuring of current of resistance and voltmeter and voltage of battery, then, calculating the power of resistance and the power of voltmeter.

This picture showed the data and graph for measuring numbers and calculating numbers. From the graph, we knew that current, voltage, and power have relationship. They are direct ratio.

The resistance has relationship with density, length, and area. From the formula, we knew that the length and density is big, and the area is small, so the resistance is big.

This data showed different material,length, and area have different resistance.