Basic Electricity 2, WASSCE (SC), 2017

Question 4

 

State the function of the following in a d.c. generator

  1. yoke;
  2. poles;
  3. commutator;
  4. armature.

Observation

The expected answers were;

  1. Yoke:
  2. It carries the magnetic flux produced by the poles.
  3.  It provides mechanical support for the whole machine            
  4. Poles: 

(i)  produce the magnetic flux                                                 
(ii) act as mechanical support to the field coils                                             

  1. Commutator:  this converts the alternating current (A.C) induced in the armature into unidirectional current.  
  2. Armature: This generates the electromotive force (e.m.f) when it cuts the magnetic field                                                                                                                                                 

Candidates that attempted this question did fairly well.