# Resistor power and derating screening
# Scope: DC resistor electrical and thermal dissipation.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

voltage = 12 V
resistance = 1000 ohm
rating = 0.25 W

current := voltage/resistance [A]
power := voltage^2/resistance [W]
fraction := power/rating

check rating budget: fraction <= 0.8

scenario alternative: voltage = 9.6 V