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In diverter resistor field control method of DC series motor, variable resistor is added ________

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In diverter resistor field control method of DC series motor, variable resistor is added ________

(a) In parallel with field

(b) In series with field

(c) In parallel with armature

(d) In parallel with load

I had been asked this question by my school principal while I was bunking the class.

Question is taken from Speed Control Using Field Control of Series Motor in section DC Motors of DC Machines

1 Answer

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Right choice is (a) In parallel with field

Easy explanation: Diverter is a small variable resistor, which is connected in parallel with field winding. By varying this resistance value, the field current and consequently the field ampere-turns can be varied and speed can be controlled.

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