formula for parallel circuits

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Michele

Joined Nov 29, 2005
1
If the total circuit dissipation is 1.44 Watts on a three branch parallel resistor and branch 1 is half the current value of branch 2 and one third the current value of branch 3; v applied to the circuit is 120V.
What are the v, i, r, and p values for the circuit and for each branch
 

hgmjr

Joined Jan 28, 2005
9,029
Total R of the circuit is V^2/R = (120*120)/1.44 or 10,000 ohms

Total I of the circuit is V/R = 120/10000 = 0.012 Amps

These are the starting points. Everything else proceeds from these values.

hgmjr
 

JoeJester

Joined Apr 26, 2005
4,354
Michelle,

Draw your circuit and get into the habit of constructing a table like the one I attached illustrating for your problem.

Fill in the knowns and think about the problem.
 

HEALEY

Joined Nov 10, 2004
5
[attachmentid=995]
Originally posted by Michele@Nov 29 2005, 08:13 PM
If the total circuit dissipation is 1.44 Watts on a three branch parallel resistor and branch 1 is half the current value of branch 2 and one third the current value of branch 3; v applied to the circuit is 120V.
What are the v, i, r, and p values for the circuit  and for each branch
[post=12063]Quoted post[/post]​

HOPE THE ATTACHMENT HELPS - CHECK LIBRARY FOR ELECT ENGRG BOOK WITH KIRCHOFF'S LAWS
SHOULD EXPLAIN MY LOGIC IN ATTACHMENT[attachmentid=995]
 

HEALEY

Joined Nov 10, 2004
5
Originally posted by HEALEY@Nov 30 2005, 12:18 PM
[attachmentid=995]
HOPE THE ATTACHMENT HELPS - CHECK LIBRARY FOR ELECT ENGRG BOOK WITH KIRCHOFF'S LAWS
SHOULD EXPLAIN MY LOGIC IN ATTACHMENT[attachmentid=995]
[post=12098]Quoted post[/post]​


Sorry- there is an incorrect value in the attacment I transmitted earlier - new attachment adds a comment with the correct value
 

HEALEY

Joined Nov 10, 2004
5
Originally posted by HEALEY@Nov 30 2005, 04:24 PM
Sorry- there is an incorrect value in the attacment I transmitted earlier - new attachment adds a comment with the correct value
[post=12106]Quoted post[/post]​


Again my apologies - comment did not appear - try this one
 
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