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."
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"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
Prerequisites
Slides
Interactive presentations perfect for visual learners • Interactive presentation
Slide Video
Watch narrated slides play like a video lesson • Narrated slide playback
Task-sets
Learning resource • 1 task-sets