Electronics - Parallel Circuits - Discussion
Discussion Forum : Parallel Circuits - General Questions (Q.No. 1)
1.
When parallel resistors are of three different values, which has the greatest power loss?
Discussion:
32 comments Page 3 of 4.
CATcracker said:
1 decade ago
In parallel voltage constant dats by we take p=v^2/r...if we take p=i^28r...p may vary with variation of "i" bt in p=v^2/r.....p varies with variation of r.
Bhawna said:
1 decade ago
The resistors are in parallel & in parallel voltage is same but in parallel current divides, current follows the low resistive path, so high pwr loss occurs in small resistance.
Ravikumar said:
1 decade ago
Considering the ohms law p=v^2/R so, if are is low power loss is more.
Bruno said:
1 decade ago
In simple Short circuit haven't any load(That mean havn't parallel
Resistors )(In short circuit power loss is occur).So small resistance is almost like to short circuit..AS A RESULT SMALL RESISTANCE IS FOR HIGH POWER LOSS.
Resistors )(In short circuit power loss is occur).So small resistance is almost like to short circuit..AS A RESULT SMALL RESISTANCE IS FOR HIGH POWER LOSS.
Mahtaj Banu said:
1 decade ago
As p=v*i.
And v=i*r.
So on substituting we in p, we get p=i*i/r.
Which implies p and are are inversely proportional. So for high power it is low resistor and vice-versa.
And v=i*r.
So on substituting we in p, we get p=i*i/r.
Which implies p and are are inversely proportional. So for high power it is low resistor and vice-versa.
Deepak aneja said:
1 decade ago
When three resistances are connected parallel with same battery(cell)of voltage v . current divides & flows through parallel combination of resistances. max. current flows though the resistor of smaller value
as p=vi here i is large for smaller value of resistor.
as p=vi here i is large for smaller value of resistor.
Neha Paunikar said:
1 decade ago
Since power is inversely proportional to current I.
Khan said:
1 decade ago
In the equation P=(I^2)R ...........I is not constant so we cant consider it.
Hence P=V2/R is correct as in this case V is constant as parallel resistance has same voltage.
However if it would have been series circuit then your answer will be right.
Hence P=V2/R is correct as in this case V is constant as parallel resistance has same voltage.
However if it would have been series circuit then your answer will be right.
Saichaitanya said:
1 decade ago
WHY NOT THE CORRECT ANSWER IS OPTION D??????
SINCE, P=VI, V=IR
THEREFORE, P=(IR)*I => P=(I^2)R
SINCE, P=VI, V=IR
THEREFORE, P=(IR)*I => P=(I^2)R
Vigneshwaran said:
1 decade ago
i=v/r if value of r is small,i will be more..........
p=i^2r therefore the loss will be more
p=i^2r therefore the loss will be more
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