Mark the wrong option. Which of the following cause and effect behaviour in speed control is correct when field resistance is increased.(a) Decrease in flux(b) Increase in armature current(c) Increase in EMF(d) Decrease in speedThe question was asked in unit test.My enquiry is from Speed Control of DC Motors in chapter DC Motors of Electrical Machines

Mark the wrong option. Which of the following cause and effect behavio

1.	Mark the wrong option. Which of the following cause and effect behaviour in speed control is correct when field resistance is increased.(a) Decrease in flux(b) Increase in armature current(c) Increase in EMF(d) Decrease in speedThe question was asked in unit test.My enquiry is from Speed Control of DC Motors in chapter DC Motors of Electrical Machines
Answer» Right choice is (c) INCREASE in EMF To explain: When field resistance is INCREASED, emf ACTUALLY decreases, not increases DUE to fall in FLUX.

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