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QUIZ-I (Electric Motors)

QUIZ -I Code:     15EE44                    Subject: Electric motors                                   Semester: IV                         Date:       03/02/2018             Staff : Prof. Abhinay Gupta 1.     The speed of a DC motor is …..  directly proportional to back emf  directly proportional to flux  inversely proportional to product of flux and back emf  always constant 2.     As the load on DC shunt motor increased, its speed …..  increases slightly  remains constant  increases proportionately  reduces slightly 3.       In a dc motor, unidirectional torque is produced with the help of …….  end plates  both brushes and commutator  commutator  brushes 4.         The starting resistance of DC motor is usually …………..  200 ohm  infinitely large  large  small 5.       T he DC Motor which has approximately constant speed ……  shunt motor  cumulatively compound motor  series motor  differently compound motor 6
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ELECTRICAL MACHINES-I

In electrical engineering , electric machine is a general term for machines using electromagnetic forces , such as electric motors , electric generators , and others. They are electromechanical energy converters: an electric motor converts electricity to mechanical power while an electric generator converts mechanical power to electricity. The moving parts in a machine can be rotating (rotating machines) or linear (linear machines). Besides motors and generators, a third category often included is transformers , which although they do not have any moving parts are also energy converters, changing the voltage level of an alternating current . [1] Electric machines, in the form of generators, produce virtually all electric power on Earth, and in the form of electric motors consume approximately 60% of all electric power produced. Electric machines were developed beginning in the mid 19th century and since that time have been a ubiquitous component of the infrastructure. Deve
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Electric motors Quiz 2

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KLE Dr. M. S. Sheshgiri College of Engineering and Technology, Belagavi Department of Electrical And Electronics Engineering QUIZ -2 Code:     15EE44                    Subject: Electric motors                                   Semester: IV                         Date:       03/02/2018             Staff : Prof. Abhinay Gupta 1.     The function of ____ in dc generator is to collect current from commutator and deliver it to external circuit  Dummy Coils  Brushes  Equalizer rings  End rings 2.     In DC Motor speeds above the rated speed can be attained by varying which of the following winding current  Either Filed winding or Armature winding  Armature winding  Field Winding 3.     The main advantage of dc motors compared to ac motors are: (Choose multiple answers)  High Starting Torque  Speed Control  Less Maintenance  Low Cost 4.     The emf produced in dc generator is ___ induced emf:  Dynamically  Statically  Electrostaticall
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