Question about ohms law to calculate this figure

[dvmman]

Hi can anyone tell me in an easy way how this resistance was come by -
2 Pole Synchronous
220 / 240 Volt 25Watt, Resistance = 165 0hm

I have tried to use ohms law to get the Resistance as above but i cannot seem to get it to 165 ohms .. Can someone please show me the right calculations for the above..

Sorry to sound a little dim as i am new to ohms law and cannot seem to work out the above just using voltage and wattage to get the resistance to 165 ohms.

Thanks

 

[keith1200rs]

You are using ohms law but it sounds like you have an inductive load (a motor). So ohms law does not determine the power dissipation.

Keith

 

[dvmman]

Hi could you explain a little ..It is a washing machine pump that i was trying to understand how the manual gets to the above figures .

Thanks

 

[keith1200rs]

I am not sure quite what is going to be the best explanation. Try this: Power factor - Wikipedia, the free encyclopedia

Keith.