PhysicsElectromagnetic inductionJAMB
A transformer does not work with a steady direct current because
Show answer
Answer: C. a steady current produces no changing magnetic flux
Induction needs a changing flux; a steady d.c. gives a constant flux, so no e.m.f. is induced in the secondary.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.