On what factor does the size of resistor depends April 20, 2018 by admin Question: On what factor does the size of resistor depend? Answer: The size of resistor depends on its wattage rating (power consumption). The higher the power rating, the larger the size becomes. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on WhatsApp (Opens in new window)