About VOLTAGE and RPM?

Question

Hi Everybody,
About dc current
I have two dc adapter one is 500mah and 5v (500mahx5voltage=2500watt)
and second one is 2500mah and 1v (2500mahx1voltage=2500watt)

The both of adapter watt is same but mah and voltage is different
Can i get same rotation per minute(Rpm Dc motor) in different mah and different voltage but watt should be same or i am wrong?
And how i can get same (RPM) in different mah and different voltage?
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Convert Table
Convert AMPS to Watts:
Watts = Voltage x Amps

Answer 1

V will determine RPM. Higher the V, higher the RPMs.

Think of a model train transformer. It adjusts the voltage to the track. Higher the voltage, faster the train goes.

Answer 2

To drive a DC motor, you need the same voltage. The motor will only consume the amperage it needs to turn at it's characteristic RPM at that voltage. So even if the adapter were rated at 5v at 70000ma, the motor would still draw less than 500ma. However, if you increase the voltage, the motor will consume more amperage and turn faster. At 1v, the motor is likely to turn much more slowly and will consume much less than 500ma. P=VI=I^2*R where R is the impedance presented by the motor

Answer 3

tis the voltage which determines the rotarion per minute and not the ma or a ok!!!
Test urself by taking a dc motor (perhaps a simpler radio one or the 2.5v one)
try fixing three bladesonto it's Shaft, now connect it to a 3v (2 1.5v batteries connected in series) AND TRY now u will notice the breeze produced by ur fan!!! AND nOW TrY wit a 6v dont worry nothing would happen and enjoy the more powerful cool breeze yar...
Bye
Regards
Raghav R V

Answer 4

I think you are confused. Dc motor runs on battery, AC motor runs on live circuits. You have to vary the resistance to vary Amps. DC adapters are made to specified voltage & amps