DC Motors Quiz Question with Answer

121. The armature voltage control of D.C. motor provides

  1. constant voltage drive
  2. constant current drive
  3. constant torque drive
  4. none of the above

122. The condition for maximum efficiency for a D.C. generator is

  1. eddy current losses = stray losses
  2. hysteresis losses = eddy current losses
  3. copper losses = 0
  4. variable losses = constant losses

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