Induction Study Guide

• How to figure equivalent inductances of inductors in series and parallel
• How to use the right-hand motor rule and left-hand generator rule to figure directions of currents or forces in magnetic fields
• When induction will occur.
• What effect is the basis for the operation of a motor? Of a generator?
• What does Lenz's law say about direction of induced current?
• What type of energy conversions are taking place in motors and generators?
• When is back emf at a maximum? minimum?
• What is the coil position when maximum current is generated in a generator? maximum torque in a motor?
• What is the function of the commutator in a dc motor or generator?
• The meaning of commutator, stator, rotor, magneto, exciter, alternator, universal motor, induction motor, synchronous motor
• And be able to solve problems involving:
• The self inductance of a coil
• The mutual inductance between two coils
• The induced emf in a wire moving at constant speed through a magnetic field
• The secondary voltages, number of turns, and/or currents in a transformer
• The efficiency of a transformer
• The unknown parameters of a generator circuit, such as currents, potential differences, emf, etc., and draw the circuit diagram
• The directions of induced currents using Lenz's law.