View Single Post
Old 06-14-2004, 07:18 PM   #12 (permalink)
james t kirk
Junkie
 
james t kirk's Avatar
 
Location: Toronto
Re: Re: dimmer on lightswitch = less energy used?

Quote:
Originally posted by wondash
Here's one of the first formulas they teach you in electrical engineering: v=ir
[voltage] = [current] multiplied by [resistance]
Your voltage is constant and your dimmer switch acts as a variable resister, so as you turn the switch you increase or decrease the resistance. Therefore, you increase or decrease the current. So, in answer to your question, dimming the light does draw less current. But the bulb also burns less efficiently and the dimmer switch transfers the unused energy to heat.
Please tell me you aren't an electrical engineer!!!
james t kirk is offline  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73