46. In D.C. motor which of the following can sustain the maximum temperature rise?
47. In variable speed motor
48. If the terminals of armature of D.C. motor are interchanged, this action will offer following kind of braking
49. If a D.C. motor is to be selected for conveyors, which motor would be preferred ?
50. For a D.C. shunt motor if the excitation is changed
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