Electrical Machines In a dc machine 72 number of coils are used. Find the number of commutator segments required? 74 72 36 37 74 72 36 37 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If two 8-pole dc machines of identical armature sare wound, one with lap winding and the other with wave winding, then wave-wound machine will have more rated current and more voltage wave-wound machine will have more rated voltage and less current lap-wound machine will have more rated voltage and more current lap-wound machine will have more rated voltage and less current wave-wound machine will have more rated current and more voltage wave-wound machine will have more rated voltage and less current lap-wound machine will have more rated voltage and more current lap-wound machine will have more rated voltage and less current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following generators negative voltage regulation can occur? series generators both B and C over compound generator shunt generator series generators both B and C over compound generator shunt generator ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For higher values of armature, the speed of a DC series motor is Proportional to armature current. Proportional to the square of armature current. Constant. Inversely proportional to armature current. Proportional to armature current. Proportional to the square of armature current. Constant. Inversely proportional to armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated) changes to 0.5 times the original value remain the same as the original changes to 1.5 times the original value changes to three times the original value changes to 0.5 times the original value remain the same as the original changes to 1.5 times the original value changes to three times the original value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for parallel operation of alternators? Speed of alternators should be same Frequency should be same Terminal voltage is same Both 1and 2 Speed of alternators should be same Frequency should be same Terminal voltage is same Both 1and 2 ANSWER DOWNLOAD EXAMIANS APP
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