Related Questions

There are 23 poles with a constant distance between each pole. A car takes 24 seconds to reach the 12th pole. How much more time will it take to reach the last pole?
A 40 seconds
B 44 seconds
C 48 seconds
D 46 seconds
If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens
A This will make armature to take heavy current, possibly burning it
B This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses
C Nothing will happen to motor
D Motor will come to stop
If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens
A Nothing will happen to the motor
B This will make armature to take heavy current, possibly burning it
C This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses
D Motor will run at very slow speed
A 4 pole generator with 16 coil has a 2-layer lap winding. The pole pitch is -
A 8
B 4
C 16
D 32
The emf generated in a dc generator is directly proportional to
A Flux per pole
B No, of oples
C Spped of armature
D all above
Two forces of magnitude 3m and 2m respectively have a resultant R. if the first force is doubled, the magnitude of the resultant is doubled.Find the angle betuween forces?
A 90°
B 120°
C 135°
D 145°
3N ও 2N মানের দুইটি বলের লদ্ধি R । প্রথম বলের মান দ্বিগুণ করলে লদ্ধির মানও দ্বিগুণ হয়। বলদ্বয়ের মধ্যবর্তী কোণের মান হবে- (The resultant of two forces 3N and 2N is R. If the first force is doubled then the resultant is also doubled. The angle between the forces is-)
A 30°
B 45°
C 65°
D 120°
A cumulatively compounded long shunt generator when operating as a motor would be
A Cumulatively compounded long shunt
B Differentially compounded long shunt
C Cumulatively compounded short shunt
D Differentially compounded short shunt
A shunt generator can self-excite
A Only if the resistance of the field circuit is less than critical value
B Only if the resistance of the field circuit is greater than critical value
C Irrespective of the value of the resistance in the field circuit
D None of the above
In a shunt generator the voltage build up is generally restricted by
A speed limitation
B armature heating
C insulation restrictions
D saturation of iron

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