Electrical Machines In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree? 45. 30. 180. 270. 45. 30. 180. 270. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On which of the following factor/factors the speed of a DC motor depends upon? Applied voltage. Armature current. All of these. Field flux. Applied voltage. Armature current. All of these. Field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For higher values of armature, the speed of a DC series motor is Proportional to armature current. Constant. Proportional to the square of armature current. Inversely proportional to armature current. Proportional to armature current. Constant. Proportional to the square of armature current. Inversely proportional to armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 1500 rpm. 3600 rpm. 4000 rpm. 3000 rpm. 1500 rpm. 3600 rpm. 4000 rpm. 3000 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If iron loss and full load copper loss of any transformer are denoted by Pi and Pc, then the load corresponding to maximum efficiency is given by (Pi / Pc)1.6 × full Load. (Pi / Pc) × full Load. (Pi / Pc)0.5 × Full Load. (Pi / Pc)2 × full Load. (Pi / Pc)1.6 × full Load. (Pi / Pc) × full Load. (Pi / Pc)0.5 × Full Load. (Pi / Pc)2 × full Load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC Motor 3 point starter is used to provide protection against Low-Voltage. all of above. limit the starting current to a safer value. provide overload protection. provide protection against Low-Voltage. all of above. limit the starting current to a safer value. provide overload protection. ANSWER DOWNLOAD EXAMIANS APP
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