Motors, Generators, and Transformers

Start lessonBegins with Motors generators transformers · Slides

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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.

20.3

"In a motor, electrical energy is converted into mechanical energy. In a generator, mechanical energy is converted into electrical energy. A transformer changes the voltage of AC electricity." "For an ideal transformer: V_s/V_p = N_s/N_p and V_p I_p = V_s I_s."

"In a motor, electrical energy is converted into mechanical energy. In a generator, mechanical energy is converted into electrical energy. A transformer changes the voltage of AC electricity."
"For an ideal transformer: V_s/V_p = N_s/N_p and V_p I_p = V_s I_s."

What you'll learn

Explain how an electric motor converts electrical energy to mechanical energy using magnetic force on current-carrying loops
Explain how a generator converts mechanical energy to electrical energy using electromagnetic induction
State the principle of a transformer and calculate output voltage and current using the turns ratio
Apply energy conservation to transformers (P_primary = P_secondary for ideal transformer)
Connect the transformer to the power transmission problem from sec-19-4

Review first:

Electromagnetic Induction

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Motors generators transformers

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