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if i have 2 power supply which the same power rating, in this case 100 watts(but one is 12V 10Ah,and the other one is 20V 5Ah),can someone please tell me what are the difference between them?

2007-03-07 15:27:29 · 5 answers · asked by Anonymous in Science & Mathematics Engineering

ops, i am sorry, both power supply is suppose to have a power output of 100watt. this is a dc lead acid battery.
one rated at 10V 10Ah and the other one is 20V 5Ah.

2007-03-08 03:25:45 · update #1

5 answers

The power is the same, yes, but the voltage and current ratings are different. The difference is the voltage and current ratings. One will give you 10V at 10A for an hour, and the other will give you 20V at 5A for an hour. The cell configurations inside the battery will be different. Inside the battery you'll have series and parallel configurations of cells. The 20V, 5A battery will have more cells in series than in parallel, and the 10V, 10A battery will have more cells in parallel than in series.

2007-03-08 05:46:04 · answer #1 · answered by joshnya68 4 · 0 0

I am not sure what your asking because you have given us the volatage rationg of each power supply. The Ah (Ampere hour rating) is not the same thing as the A current rating of the power supply. Are these DC power supplies?



For DC power supplies:

If 10A is the current rating for the 12V power supply and 5A rating for the 20V power supply then the manufacturer of the 12V power supply made a mistake to print 100W on the case. The power rating on the 12V power supply should be 120W and the rating on the 20V power supply should be 100W.

2007-03-07 19:48:43 · answer #2 · answered by Soutballas 1 · 0 0

Watts or Power is simply the Voltage multiplied by the Amperage.
In your example, 12v@10A is 120 Watts and 20v@5A is 100 Watts.
The real difference is the potential or voltage - one is 12v and the other is 20v. The power rating determines how much of a constant load the secondary of the transformer will supply.

2007-03-07 15:34:52 · answer #3 · answered by LeAnne 7 · 0 0

there's a few differences. but the one I think you're asking about is that the wiring is probably different thicknesses. higher amps require larger wires. Be it a real wire or a interconnect on a circuit board.

2007-03-07 16:19:36 · answer #4 · answered by Dr W 7 · 0 0

A.c voltage rating is : 230 v,440 v,
D.c voltage rating is 12v,24v,50v,110v,220v,440v

2007-03-08 02:20:49 · answer #5 · answered by Anonymous · 0 0

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