PPE23_EnergyPower

# PPE23_EnergyPower - Current Resistance and Circuits Energy...

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Current, Resistance, Current, Resistance, and Circuits and Circuits Energy and Power And Real Batteries © RHJansen

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Power © RHJansen Power is the rate of work (rate of change in energy). P = τ P = ∆Ε In electricity it will be electrical potential energy that changes. P = ∆Υ Ε P = θ∆ς P = Ις ∆Υ = θ∆ς and energy is and current is I = Θ
Common Phrase Indicating Power © RHJansen Often problems do not ask for power. Instead they frequently ask for the rate of work the rate that energy is used (consumed) the rate that energy is produced (generated) While the left equation is from mechanics it is still valid for electricity problems. The right equation is specific to electricity. P = τ P = Ις

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Other Equations for Power © RHJansen P = Ις Combining the power equation with Ohm’s Law generates two additional power equations P = Ι 2 Ρ P = ς 2 V = ΙΡ P = Ι ΙΡ ( 29 P =
Example 1 © RHJansen A 3 Ω resistor is connected to a battery producing 6 V. Determine the power in the circuit.

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PPE23_EnergyPower - Current Resistance and Circuits Energy...

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