A dynamometer wattmeter can be used for
any of the above
A.C. only
D.C. only
both D.C. and A.C.
both D.C. and A.C.
For measuring current at high frequency we should use
moving iron instrument
electrostatic instrument
thermocouple instrument
none of the above
thermocouple instrument
Which of the following are integrating instruments ?
Ampere-hour and watt-hour meters
Wattmeters
Voltmeters
Ammeters
Ampere-hour and watt-hour meters
An induction meter can handle current up to
100 A
30 A
0.416666667
60 A
100 A
For handling greater currents induction wattmeters are used in conjunction with
either of the above
current transformers
potential transformers
power transformers
current transformers
A moving-coil permanent-magnet instrument can be used as _____ by using a low resistance shunt.
ammeter
voltmeter
flux-meter
ballistic galvanometer
ammeter
_____ instruments are those which measure the total quantity of electricity delivered in a particular time.
Recording
Indicating
Absolute
Integrating
Integrating
Which of the following devices may be used for extending the range of instruments ?
Shunts
Multipliers
All of the above
Current transformers
All of the above
According to application instruments are classified as
both and
moving coil
portable
switch board
both and
The use of _____ instruments is merely confined within laboratories as standardizing instruments.
absolute
recording
indicating
integrating
absolute
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