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3 cards from this section. Quick, good the night before a test.
What is the primary use of a potentiometer?
Think about what devices measure voltage.
What is the relationship between the length of wire and potential difference in a potentiometer?
Consider how more length might impact voltage readings.
What is the primary function of a potentiometer?
Focus on what is measured without affecting the circuit.
True or False: A potentiometer draws significant current to take measurements.
Think about how it functions differently from other measurement tools.
A laboratory experiment requires you to measure the emf of two cells using a potentiometer. Cell A shows a reading of 1.5 volts at 100 cm, and cell B reads at 60 cm. What is the emf of cell B?
Set up the proportion based on the lengths and known voltage.
Explain how a potentiometer can be set up to measure the internal resistance of a battery.
Think about open and closed circuit measurements.
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