Amara has two different lightbulbs of unknown resistance, a 9V battery, and an ammeter. She wires the bulbs to the battery in series and measures the current through the battery to be 0.2 A, then wires the bulbs to the battery in parallel and measures the current through the battery to be 0.9 A. From these two measurements, determine the resistances of the two bulbs.
Amara has two different lightbulbs of unknown resistance, a 9V battery, and an ammeter. She wires the bulbs to the battery in series and measures the current through the battery to be 0.2 A, then wires the bulbs to the battery in parallel and measures the current through the battery to be 0.9 A. From these two measurements, determine the resistances of the two bulbs.
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Transcribed Image Text:In a neat and organized fashion, write out a solution to the problem above which includes all
of the following:
• A fully-labeled sketch of the physical situation which includes all relevant objects and
moments in time.
• A circuit diagram clearly showing the electrical connections in the two circuits Amara
made.
Use your representations and your knowledge of physics to determine the resistances of
the lightbulbs. Explain each step in your solution as you make it.
• An evaluation of your solution (not just your final answer).
●
Transcribed Image Text:Amara has two different lightbulbs of unknown resistance, a 9V battery, and an ammeter. She
wires the bulbs to the battery in series and measures the current through the battery to be
0.2 A, then wires the bulbs to the battery in parallel and measures the current through the
battery to be 0.9 A. From these two measurements, determine the resistances of the two
bulbs.
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