Before revision: 18–21, The English Universities Press Ltd. Power dissipation At any instant, the power P (watts) consumed by a resistor of resistance R (ohms) is calculated as: where V (volts) is the voltage across the resistor and I (amps) is the current flowing through it.
After revision: Resistor warming caused by electrical current captured by thermal camera18–21, The English Universities Press Ltd. Power dissipation At any instant, the power P (watts) consumed by a resistor of resistance R (ohms) is calculated as: where V (volts) is the voltage across the resistor and I (amps) is the current flowing through it.