Electronics - Resistance and Power - Discussion

On our resistor wattage we have 1/8W, 1/4W, 1/2W, 1W,2W so when we rate we take the closest to 0.00047W which is the 0.25W. If there was the 0.125 W(1/8) resistor would be more suitable.

I can't understand how 0.25w came?

Please explain.

Here, the m value is 10^-3 then how to get the answer 1/4?

Explain how it come 1/4?

I am not getting the solution. Please explain it.

1/4 watts, 1/2 watts or 1 watts means the physical size of the resistor and not the technical measures.

1/4 watts means the resistor physical size is smaller. This usually uses in experiments or another device that handle a small amount of power.

And 1 watt means the physical size of the resistor is bigger and usually use in high power use to be not destroyed immediately by the current flowing.