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4 cards from this section. Quick, good the night before a test.
What does Ohm's Law state about the relationship between voltage, current, and resistance?
Recall the formula V = I x R.
What is the unit of voltage?
Think about the device used to measure voltage.
What is Ohm's Law?
Consider the relationship between voltage and current.
If voltage is doubled and resistance remains the same, what happens to the current?
Think about how pressure affects water flow.
A circuit has an unknown resistance but carries a current of 5A at a voltage of 20V. Calculate the resistance and explain the steps you took to find the solution.
You need to rearrange the Ohm's Law formula.
If a device requires 60 Watts of power and operates at 120V, what is the required current? Then, calculate the resistance of the device.
Start with the power formula to find current before applying Ohm's Law.
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