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Measurement and Instrumentation

Measurement and Instrumentation
In induction type ammeter, _____ damping is provided.

Eaddy current
None of the listed here
Air friction
Fluid friction

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Measurement and Instrumentation
The absolute measurement of resistance is done by

Ohm’s law method
Rayleigh method
Lorenz method
Bridge Method

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Measurement and Instrumentation
Which one of the following meters has maximum loading effect on the circuit under measurement ?

 1 MΩ/volt
 1000 Ω/volt
 10 MΩ/volt
 100 Ω/volt

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Measurement and Instrumentation
Ryall crest voltmeter is used for measurement of

AC voltage of any form
High DC voltage
High AC voltage
Low frequency voltage

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Measurement and Instrumentation
A bridge circuit is shown in the figure below. Which one of the sentence given below is most suitable for balancing the bridge?

 First adjust R4 and then adjust R2.
 First adjust R2 and then adjust R3.
 First adjust R2 and then adjust R4.
 First adjust R4 and then adjust R1.

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Measurement and Instrumentation
A DC A-h meter is rated for 15 A, 250 V. The meter constant is 14.4 A-sec/rev. The meter constant at rated voltage may be expressed as

 960 rev/KWh.
 3750 rev/KWh.
 3600 rev/KWh.
 1000 rev/KWh.

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