JAMB - Physics (2017 - No. 19)
Which of the following operations can be used to convert an alternative current dynamo into a direct current dynamo
number of turns in the coil is increased
strength of the field magnet is increased
slip rings are replaced with split ring commutator
coil is wound on a soft iron armature
คำอธิบาย
A d.c generator is one in which its current is allowed to flow in one direction even through it may vary in value an a.c generator can only be made to produce a d.c by replacing the two slip rings with a single split ring or commutator.