Calculating Power Rating For Resistor
Calculating Power Rating For Resistor . V = i × r. The voltage across the resistor, the current through the resistor, or its resistance in ohms to find the power dissipation in watts. Resistor Wattage Vs Size from izabellices.blogspot.com Resistors with power ratings of. Resistors with higher power ratings are usually referred to as power resistors, and used specifically to dissipate power. Resistor power rating = i f 2 x resistor value = (10ma) 2 x 470 ω = 0.047w = 47mw.