5. 3 V; 0.5 A is written on the packet of torch bulbs. a. Use your ideas about electrons to describe the mechanism of the energy transfer when the torch is 'on'. b. Calculate the power conversion for the bulb in normal use. c. The life of the bulb is approximately 10 hours. How much energy will it have dissipated in its lifetime?
5. 3 V; 0.5 A is written on the packet of torch bulbs. a. Use your ideas about electrons to describe the mechanism of the energy transfer when the torch is 'on'. b. Calculate the power conversion for the bulb in normal use. c. The life of the bulb is approximately 10 hours. How much energy will it have dissipated in its lifetime?
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter23: Series And Parallel Circuits
Section: Chapter Questions
Problem 49A
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