The magnetic factor required to reduce the residual magnetization zero is called?
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Description : If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be?

Answer : If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be zero.

Answer : In D.C. machines the residual magnetism is of the order of 2 to 3 percent.

Description : ln HRC fuse the time between cut-off and final current zero is called

Answer : ln HRC fuse the time between cut-off and final current zero is called the arcing time

Description : Which of the following has nearly zero temperature coefficient? A) Constantan B) Manganin C) Both A and B D) None of these

Answer : Which of the following has nearly zero temperature coefficient? A) Constantan B) Manganin C) Both A and B D) None of these

Description : Is electric potential zero when electric field is zero?

Answer : Yes  .If  electric  field  is  zero  then  electric  potential  is  zero  ,  not  even  one.