101.
The bearings used to support the rotor shafts are generally
A
ball bearings
B
bush bearings
C
magnetic bearmgs
D
needle bearings
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The bearings used to support the rotor shafts are generally
ball bearings
bush bearings
magnetic bearmgs
needle bearings
The terminal voltage of a D.C. shunt generator drops on load because of all of thefollowing reasons except
armature reaction
armature resistance drop
field weakening due to armature reaction and armature
commutation
Wave winding is composed of
any even number of conductors
any odd number of conductors
that even number which is exact multiple of poles + 2
that even number which is exact multiple of poles
Lap winding is composed of
any even number of conductors
any odd number of conductors
that even number which is exact multiple of poles + 2
that even number which is exact multiple of poles
Armature coil is short circuited by brushes when it lies
along neutral axis
along field axis
in any of the above positions
in none of the above positions
In over compounded generator, full load terminal voltage is
almost zero
less than noload terminal voltage
more than noload terminal voltage
equal to no-load terminal voltage
In a four-pole D.C. machine
all the four poles are north poles
alternate poles are north and south
all the four poles are south poles
two north poles follow two south poles