|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: RE: voltage drops question posted by pictureguy on August 29, 2012 at 14:19:50:
When powerline voltage drops what does happen? The resistence of the circuit is the same......so something's got to give. IF power stays the same by P=IE current must rise. So, what changes? Voltage drops and current drops too?Power does not stay the same.
Example.
A 100 watt incandescent light bulbP = E x I
100 watts / 120 volts = .83 amp.R = E / I
120V / .83 = 144.58 ohmsI = E / R
96V / 144.58 ohms = 0.66 amp.P = E x I
96V x 0.66 amp = 63.36 watts..
A squirrel cage motor on the other hand tries to maintain its power rating.
A drop in voltage results in an increase in current.
Jim
Edits: 08/29/12 08/29/12
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: voltage drops question - jea48 15:14:08 08/29/12 (7)
- Two things - Jon Risch 20:37:30 08/29/12 (6)
- RE: Two things - rick_m 09:28:49 08/30/12 (1)
- RE: Two things - Jon Risch 19:43:27 08/30/12 (0)
- I gave a simple example. Not technical...... - jea48 08:10:20 08/30/12 (3)
- RE: I gave a simple example. Not technical...... - Jon Risch 19:59:15 08/30/12 (2)
- Jon I appreciate your reply. - jea48 21:24:29 08/30/12 (1)
- RE: Jon I appreciate your reply. - Jon Risch 22:26:29 09/01/12 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
