7.4 Electric Power

As a review of Unit 4, power is the rate of energy transfer over time. As explained previously, circuit components can dissipate energy, which is found with the equation below.

P is the power dissipated by a circuit component I is the current through the circuit component V is the voltage across the circuit component

One circuit component that is usually seen as dissipating energy is a bulb. When it dissipates energy, it will glow. The more power a bulb dissipates, the more luminous it will be.