Lightbulb resistance and efficiency
Not what you're looking for?
A GE Softwhite lightbulb is rated as follows:
rated power = 60 W ;
rated optical power = 820 lumens (lm)
1 lm = 1/680 W
operating life = 1.5 h
rated operating voltage = 115 V
The resistance of the filament of the bulb, measured with a standard multimeter is 16.7 ohms. When the bulb is connected into a circuit and is operating at the rated values given above, determine the resistance of the filament and efficiency of the bulb.
***answer should be 220.4 ohms and 2.009%*** I didn't get the same answer...
Purchase this Solution
Solution Summary
The solution involves step-by-step calculations and explanation for finding the resistance of the filament and efficiency of a light bulb.
Solution Preview
See attachment.
lightbulb resistance and efficiency
________________________________________
AGE Softwhite lightbulb is rated as follows:
rated power = 60 W ;
rated optical power = 820 lumens (lm)
1 lm = 1/680 W
operating life = 1.5 h
rated operating voltage = 115 V ...
Purchase this Solution
Free BrainMass Quizzes
Basic Physics
This quiz will test your knowledge about basic Physics.
Intro to the Physics Waves
Some short-answer questions involving the basic vocabulary of string, sound, and water waves.
The Moon
Test your knowledge of moon phases and movement.
Introduction to Nanotechnology/Nanomaterials
This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.
Classical Mechanics
This quiz is designed to test and improve your knowledge on Classical Mechanics.