DC Motors The running speed of a dc series motor is basically determined by Armature reaction Field excitation Load None of the listed here Armature reaction Field excitation Load None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors The rheostatic speed control method is very Suitable for getting speeds above the normal Unsuitable for rapidly changing loads Economical Efficient Suitable for getting speeds above the normal Unsuitable for rapidly changing loads Economical Efficient ANSWER DOWNLOAD EXAMIANS APP
DC Motors The greatest percentage of power loss in a dc motor is due to Windage loss Copper loss Friction loss Core loss Windage loss Copper loss Friction loss Core loss ANSWER DOWNLOAD EXAMIANS APP
DC Motors Dc series motors are used in those applications where _____ is required. Constant speed None of the listed here High starting torque Low no load speed Constant speed None of the listed here High starting torque Low no load speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a series motor at no load is Infinity 1000 rpm 2000 rpm 4000 rpm Infinity 1000 rpm 2000 rpm 4000 rpm ANSWER DOWNLOAD EXAMIANS APP
DC Motors As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit Armature is temporarily open circuited A resistance is connected parallel to the armature A high value resistor is connected across the field winding A resistance is connected in series with armature Armature is temporarily open circuited A resistance is connected parallel to the armature A high value resistor is connected across the field winding A resistance is connected in series with armature ANSWER DOWNLOAD EXAMIANS APP
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