Which of the following method will not give many speed values for a DC series motor?(a) Diverter(b) Series-parallel(c) Field tapped(d) All field control methods will give many speed valuesThe question was asked during an interview.My question comes from Speed Control Using Field Control of Series Motor in chapter DC Motors of DC Machines

Which of the following method will not give many speed values for a DC

1.	Which of the following method will not give many speed values for a DC series motor?(a) Diverter(b) Series-parallel(c) Field tapped(d) All field control methods will give many speed valuesThe question was asked during an interview.My question comes from Speed Control Using Field Control of Series Motor in chapter DC Motors of DC Machines
Answer» The correct answer is (b) Series-parallel Best EXPLANATION: In series-parallel method, field winding is equally divided in two parts which are connected in series and parallel with respect to each other. THUS, in series connection we’ll get one SPEED and in parallel MODE we’ll get one speed. These 2 SPEEDS are only possible.

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