The learning objectives for this unit: -

• Understand the fundamental basics of electro-magnetic induction in the operation of:
• Solenoids - Electric motors - Generators
• Why a magnetic field is created around a current carrying inductor.
• The magnetic polarity of an inductor in relation to electrical current flow through the inductor.
• The operation of a solenoid
• The principles of Electromagnetic Induction.
• The principles of capacitors and their use in an electric circuit
• The principles of electric motors Why commutators and brushes are fitted to a d.c. generator
• Why back emf is needed in the running of an induction motor.
• The relationship between inductance and the operation of an electric motor
• Why mutual inductance is important in the operation of motors and transformers