Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
- Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
- Guided Notes →One page your students fill in and keep.
- Exit Ticket →Three items at the end of class. No student accounts.
- Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
- Homework →Assign practice; it grades itself.
"Power is the rate at which energy of any type is transferred; **electric power** is the rate at which electric energy is transferred in a circuit."
"But a Coulomb per second (C/s) is an electric current, which we can see from the definition of electric current... Thus, the equation above tells us that electric power is voltage times current, or P = IV."
"Thus, by combining Ohm's law with the equation P = IV for electric power, we obtain two more expressions for power: one in terms of voltage and resistance and one in terms of current and resistance."
"This means that the physical characteristic of a circuit that determines how much power it dissipates is its resistance."
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"Power is the rate at which energy of any type is transferred; electric power is the rate at which electric energy is transferred in a circuit."
"But a Coulomb per second (C/s) is an electric current, which we can see from the definition of electric current... Thus, the equation above tells us that electric power is voltage times current, or P = IV."
"Thus, by combining Ohm's law with the equation P = IV for electric power, we obtain two more expressions for power: one in terms of voltage and resistance and one in terms of current and resistance."
"This means that the physical characteristic of a circuit that determines how much power it dissipates is its resistance."
What you'll learn
- Define electric power and calculate it using P = IV
- Derive and apply the alternative forms P = I²R and P = V²/R
- Calculate electrical energy consumption and cost using E = Pt
- Explain why power transmission lines use high voltage and low current
- Interpret power ratings on household devices and calculate operating costs
Slides
Step through the lesson, or watch it as a narrated video
Electric power
✓ Start herePractice
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