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.Management Sciences
Category: Electrical Engineering Mcqs
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
Open circuited armature coil of a D.C. machine is________________?
A. identified by the scarring of the commutator segment to which open circuited coil is connected
B. indicated by a spark completely around the commutator
C. both A. and (b)
D. none of the above
If Q of an LC circuit increases, then bandwidth ______________?
A. Increases
B. Decreases
C. Remains the same
D. Insufficient data
An induction wattmeter can be used for_________________?
A. both D.C. and A.C.
B. D.C. only
C. A.C. only
D. any of the above
The ability of charged bodies to exert force on 6ne another is attributed to the existence of____________?
A. electrons
B. protons
C. neutrons
D. electric field
Speed control by Ward Leonard method gives uniform speed variation_____________?
A. in one direction
B. in both directions
C. below normal speed only
D. above normal speed only
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point ?
A. Electric intensity
B. Magnetic flux density
C. Electric flux
D. None of the above
Arc in a circuit behaves as_______________?
A. a capackive reactance
B. an inductive reactance
C. a resistance increasing with voltage rise across the arc
D. a resistance decreasing with voltage rise across the arc
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