Power Dissipation and Energy Absorption




What is Power dissipation in a circuit?
Any resistor in a circuit that has a voltage drop across it dissipates electrical power. This electrical power is converted into heat energy hence all resistors have a power rating. This is the maximum power that can be dissipated from the resistor without it burning out.


How to calculate power dissipation
First, we use Ohm's law ( V = I × R ), to find the current through the resistor. The voltage across the resistor is V = 9 V. The resistance of the resistor is R = 100 Ω. Then, we can use the power rule ( P = I × V ), to find the power dissipated by the resistor.


What is Power energy absorption?
Occurring with absorption of energy or heat-absorbing. Antonyms: energy-releasing

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