In majority of instruments damping is provided by
eddy currents
all of the above
spring
fluid friction
eddy currents
An ammeter is a
secondary instrument
recording instrument
absolute instrument
integrating instrument
secondary instrument
In a portable instrument the controlling torque is provided by
all of the above
spring
gravity
eddy currents
spring
The disc of an instrument using eddy current damping should be of
conducting and non-magnetic material
conducting and magnetic material
non-conducting and magnetic material
none of the above
conducting and non-magnetic material
An induction wattmeter can be used for
any of the above
A.C. only
both D.C. and A.C.
D.C. only
D.C. only
The switch board instruments
should be mounted in horizontal position
either or
should be mounted in vertical position
neither nor
should be mounted in vertical position
The function of shunt in an ammeter is to
by pass the current
none of the above
increase the resistance of ammeter
increase the sensitivity of the ammeter
by pass the current
The multiplier and the meter coil in a voltmeter are in
series
series-parallel
parallel
none of the above
series
A moving iron instrument can be used for
none of the above
both D.C. and A.C.
D.C. only
A.C. only
both D.C. and A.C.
The scale of a rectifier instrument is
linear
non-linear
either or
neither nor
linear
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