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The lightbulb used in a computer projector has a resistance of 78 Q. What is the current through the bulb when it is operating on 120 V? A

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 87CP: A resistor of an unknown resistance is placed in an insulated container filled with 0.75 kg of...

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

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The lightbulb used in a computer projector has a resistance of 78 Q. What is the current through the bulb when it is operating on 120 V?
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