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.
Pramod Bisht said:
1 decade ago
The greatest resistance has the highest power loss.
Because Voltage will be same for all resistance.
And the highest current flow from the lowest value of resistance,
Because I = V/R.
So now P = VI.
So the lowest value resistance has the max. power and so on power loss will be minimum.
So option B is right.
Because Voltage will be same for all resistance.
And the highest current flow from the lowest value of resistance,
Because I = V/R.
So now P = VI.
So the lowest value resistance has the max. power and so on power loss will be minimum.
So option B is right.
Azhagusurya said:
1 decade ago
p = vi-----1.
i = v/R----2.
Sub 2 in 1.
p = v(v/R) = v^2/R.
So when resistance decreases power loss increases.
i = v/R----2.
Sub 2 in 1.
p = v(v/R) = v^2/R.
So when resistance decreases power loss increases.
Gayathri said:
10 years ago
I do agree with option A since p = v2/R.
Siddharthachaitanya said:
10 years ago
Current always choose low resistance path. So the current flow through the resister is high. And the voltage across all resisters is equal when they connected in parallel know apply p=vi.
So here i is high when its having small resistance value so therefore p also high through the resister which is having smaller value.
So here i is high when its having small resistance value so therefore p also high through the resister which is having smaller value.
Yalam vyshnavi said:
10 years ago
Please tell me the difference between power & power loss for a resistor. Why we have to think that there is a power loss in the resistor, what about power gain?
Kyle radz said:
9 years ago
According to ohm's, the greater, the resistance, the least power loss and vice versa.
Rajashekhar said:
8 years ago
If voltage across in parallel resistor is same so current flow is depends on the value of restistance of resistor.
High resistor have low current flow & power loss also low.
High resistor have low current flow & power loss also low.
Shadan said:
8 years ago
Let,
R1= 2ohm.
R2= 4ohm.
R3=6ohm and Vs=12 V.
and according to the question all the resistors connected in parallel.
P1=V^2/R1 =12*12/2 = 72 W.
P2 = V^2/R2 = 12*12/4 =36 W.
P3 = V^2/R3 = 12*12/6 = 24 W.
Now, you can see small resistance have greater power loss than other
Note:- All the values are an assumption you can check by posting of different values or different methods to remember.
R1= 2ohm.
R2= 4ohm.
R3=6ohm and Vs=12 V.
and according to the question all the resistors connected in parallel.
P1=V^2/R1 =12*12/2 = 72 W.
P2 = V^2/R2 = 12*12/4 =36 W.
P3 = V^2/R3 = 12*12/6 = 24 W.
Now, you can see small resistance have greater power loss than other
Note:- All the values are an assumption you can check by posting of different values or different methods to remember.
(2)
Hani said:
7 years ago
Great, Thanks @Shadan.
(1)
Gautham said:
7 years ago
@All.
As the question referred to the greatest power loss in which resistance, not the greatest power consumed.
Let put in a nutshell power loss proportional to resistor value, consider resistor as a load and load drop occurs in the resistor and at the same time loss component is there in resistor which is exhibited in terms of heat. If resistor value is high heat will be high and of course, loss is high.
As the question referred to the greatest power loss in which resistance, not the greatest power consumed.
Let put in a nutshell power loss proportional to resistor value, consider resistor as a load and load drop occurs in the resistor and at the same time loss component is there in resistor which is exhibited in terms of heat. If resistor value is high heat will be high and of course, loss is high.
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