Mar 27, 2014 #1 J juz_ad Full Member level 2 Joined Dec 17, 2011 Messages 130 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 2,541 I've been calculating the required wattage for some resistors in a circuit I'm simulating using: 1) V*I 2) (I^2)*R 3) (V^2)/R I've noticed for some values the output of the equations don't match each other e.g. V = 6.2 I = 0.0271 (27.1mA) R = 47 Gives: 1) 0.168... 2) 0.034… 3) 0.817… Why is this happening for some values and how can I 'fix' it? Thanks.
I've been calculating the required wattage for some resistors in a circuit I'm simulating using: 1) V*I 2) (I^2)*R 3) (V^2)/R I've noticed for some values the output of the equations don't match each other e.g. V = 6.2 I = 0.0271 (27.1mA) R = 47 Gives: 1) 0.168... 2) 0.034… 3) 0.817… Why is this happening for some values and how can I 'fix' it? Thanks.
Mar 27, 2014 #2 M milan.rajik Banned Joined Apr 1, 2013 Messages 2,524 Helped 540 Reputation 1,078 Reaction score 524 Trophy points 1,393 Activity points 0 I = v / r = 0.1319148936170213 v * i = 0.8178723404255321 i^2 * r = 0.8178723404255322 v^2 / r = 0.8178723404255319
I = v / r = 0.1319148936170213 v * i = 0.8178723404255321 i^2 * r = 0.8178723404255322 v^2 / r = 0.8178723404255319
Mar 27, 2014 #3 J juz_ad Full Member level 2 Joined Dec 17, 2011 Messages 130 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 2,541 So it looks like the problem is my readings for I. Thanks - appreciated.