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# Year 12 Physics

## Module 6 | Electromagnetism

### Content 4: Applications of the motor effect

#### Lesson 1 | Operation of a DC motor

• investigate the operation of a simple DC motor to analyse:
– the functions of its components
– production of a torque ($\vec{\tau } = n\vec{B}IA\cos \theta$)
– effects of back emf (ACSPH108)

#### Lesson 2 | DC and AC generators and AC induction motors

• analyse the operation of simple DC and AC generators and AC induction motors (ACSPH110)

#### Lesson 3 | Lenz's law, DC motors and magnetic braking

• relate Lenz’s law to the law of conservation of energy and apply the law of conservation of energy to:
– DC motors and
– magnetic braking