Basic Electricity 2, May/June 2015

Question 5

(a) Define a generator.

(b) List the three parts of a dc machine.

(c) State ;

(i) the part of a generator that enables it to produce a d.c. output;

(ii) three methods of connecting field winding in a d.c. machine.  


The expected answers were;

(a) A generator is a machine that converts mechanical energy into electrical energy.

(b) The three parts of d.c. machine;

(i) Field windings

(ii) Armature

(iii) Commutator and its associated brush gear

(c) (i) Commutator;

(ii) (a) Series

(b) Shunt

(c) Compound

(d) Separately excited

The candidates were expected to define a generator, list three parts of a d.c. machine, state the part of a generator which enables d.c. output and state three methods of field-winding connection.

Candidates were reported to have performed very good in this question.