A generator manufacturing company was contracted to produce an a.c dynamo but inadvertently produced a...

JAMB 2004

A generator manufacturing company was contracted to produce an a.c dynamo but inadvertently produced a d.c dynamo. To correct this error, the

A. armature coil should be made of silver
B. commutator should be replaced with slip ring
C. commutator should be replaced with split rings
D. armature coil should be made of aluminium

Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts

Your School's Whatsapp Group - Join Us now

Correct Answer: Option B

Explanation

The company built a DC dynamo (with a commutator) instead of the required AC one (which needs slip rings). The simplest and most direct way to correct this—without rewinding the coil or major redesign—is to replace the commutator with slip rings.

There is an explanation video available below.

Go back to Phy classroom

Report an Error Ask A Question Download App