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Measurement and Instrumentation
A moving iron ammeter produces a full scale torque of 240 μNm with a deflection of 120° at a current of 10 A. The rate of change of self induction (μH/radian) of the instrument at full scale is
4.8 μH/radian.
114.6 μH/radian.
2.0 μH/radian.
12.0 μH/radian.
4.8 μH/radian.
114.6 μH/radian.
2.0 μH/radian.
12.0 μH/radian.
Answer
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Related Question
Measurement and Instrumentation
PMMC Instrument can be used for
Both AC and DC
AC work only
DC work only
None of the listed here
Both AC and DC
AC work only
DC work only
None of the listed here
Answer
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Measurement and Instrumentation
Relative permittivity can be measured by _______ bridge
Schering.
Wheatstones.
Hays.
Desautys.
Schering.
Wheatstones.
Hays.
Desautys.
Answer
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Measurement and Instrumentation
The range of a moving iron ac ammeter is extended by
A multiplier
Changing number of turns of operating coil
None of the listed here
A shunt
A multiplier
Changing number of turns of operating coil
None of the listed here
A shunt
Answer
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Measurement and Instrumentation
A wattmeter reads 30.34 W. The absolute error in the measurement is - 2.22 W. What is the true value of power?
None of these
28.12 W.
32.56 W .
25.45 W.
None of these
28.12 W.
32.56 W .
25.45 W.
Answer
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Measurement and Instrumentation
Wien bridge is useful for measuring
High frequency
Medium frequency
Low frequency
Very high frequency
High frequency
Medium frequency
Low frequency
Very high frequency
Answer
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