Related Questions

In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied voltage, then
A the motor is said to be fully loaded
B the torque generated is maximum
C the excitation is said to be zero per cent
D the excitation is said to be hundred per cent
In an actual transformer the iron loss remains practically constant from noload to fullload because
A value of transformation ratio remains constant
B permeability of transformer core remains constant
C core flux remains practically constant
D primary voltage remains constant
An over excited synchronous motor on noload is known as
A synchronous condenser
B generator
C induction motor
D alternator
The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except
A Armature reaction
B Armature resistance drop
C Field weakening due to armature reaction and armature
D Commutation
In over compounded generator, full load terminal voltage is
A Almost zero
B Less than no load terminal voltage
C More than no load terminal voltage
D Equal to no-load terminal voltage
In a level compounded D.C. generator, full load terminal voltage is
A Negligibly low
B Equal to no-load terminal voltage
C More than no-load terminal voltage
D Less than no-load terminal voltage
The e.m.f. generated by a shunt wound D.C. generator is E. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be
A $$\frac{{\text{E}}}{2}$$
B 2E
C Slightly less than E
D E
If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then
A the stator current will be zero
B the stator current will be very small
C the stator current will be very high
D the back e.m.f. will be more than the supply voltage
Roni is running on the ground who has been running a business for a year and his is a running business. What are the differences among the underlined words respectively?
A Finite Verb, Infinite Verb, continous
B Transitive, Intransitive, Gerund
C Transitive, Intransitive, Adjective
D Present Continuous, Perfect Continuous, Gerund
Two buses start from a bus terminal with speed of 20 km/h at interval of 10 minutes. What si the speed of a man coming from the opposite direction towards the bus terminal if he meets thebuses at interval of 8 minutes?
A 3 km/h
B 4 km/h
C 5 km/h
D 7 km/h

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