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Some light bulbs have three power settings (not including
Chapter 21, Problem 12(choose chapter or problem)
Problem 12CQ
Some light bulbs have three power settings (not including zero), obtained from multiple filaments that are individually switched and wired in parallel. What is the minimum number of filaments needed for three power settings?
Questions & Answers
QUESTION:
Problem 12CQ
Some light bulbs have three power settings (not including zero), obtained from multiple filaments that are individually switched and wired in parallel. What is the minimum number of filaments needed for three power settings?
ANSWER:
Solution 12CQ
As there are three different power setting, so each one have a different voltage supply. Also the filaments of the bulb are individually switch and wired in parallel. So for a particular power setting which has the least voltage supply only one filament is switched.