Build a circuit to demonstrate the relationship between voltage and current.
Watch a video explaining Ohm's Law, then build a circuit and conduct a demonstration so students can observe the relationship between voltage, current and resistance.
Ohm’s Law represents the relationship between voltage and current. It is usually represented mathematically:
It’s necessary to convert milliamperes (mA) to amperes (A) when using Ohm’s Law. There are 1,000 milliamperes (mA) in one ampere (A).
In order to represent Ohm's Law in a graph, use a line of best fit. These are used to show trends between sets of data and to show the relationship between various points on a scatter plot. Scatter plot graphs are commonly used with real-life data where data can be affected by the environment of the experiment.
The relationship between the dependent and independent variables can be described as a straight line if the relationship is linear in nature (often shown as a straight line graph).
Review the “Exploring Ohm’s Law” worksheet completed by your students, checking the accuracy of data recording, calculations and graphing.
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