Related Questions

A separately excited generator as compared to a self-excited generator
A Is amenable to better voltage control
B Is more stable
C Has exciting current independent of load current
D Has all above features
The length of a rectangular field F is 3 km greater than the side of a square field M , and the width of field F is 3 km less then the side of field M. If the area of field M is m2 square km, what is the area of field F?
A m2 +6
B 6
C m2 - 6
D m2 +9
When load on an over-excited or under excited synchronous motor is increased, rate of change of its armature current as compared with that of power factor is
A more
B less
C equal
D twice
A farmer has two rectangular fields. The larger field has twice the length and four times the width of the smaller field. If the smaller field has area K, then the area of the largest field is greater than the area of the smaller field by what amount?
A 4K
B 6K
C 7K
D 8K
A farmer has two rectangular fields. The larger field has twice the length and four times the width of the smaller field. If the smaller field has area K, then the area of the larger field is greater than the area of the smaller field by what amount ?
A 2K
B 5 K
C 6K
D 7K
If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to
A reverse the field connections
B increase the field resistance
C increase the speed of primemover
D check armature insulation resistance
In a separately excited generator supplying rated load the armature reaction:
A Is always present
B Is always absent
C May be sometimes present
D None of the above
A farmer has two rectangular fields. The larger has twice the length and four times the width of the smaller field. If the smaller field has area k, then the area of the larger field is greater than the area of the smaller field by what amount?
A 2k
B 6k
C 7k
D 8k
A farmer has two rectangular field. If the smaller field has area K, then the area of the larger field is greater than the area of the smaller field by what amount?
A 2K
B 7K
C 8K
D 12K
A farmer has two rectangular fields. The larger field has twice the length and four times the width of the smaller field. If the area of the smaller field is K units, what is the area of the larger field?
A 2K
B 6K
C 7K
D 8K

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