Measurement of non-electrical quantity involves the following subsystems
A linear displacement digital transducer generally uses
Magnetic effect of current is used in
In a resistance strain gauge, G =stress =kg/cm2, R =Ω. The value of ΔR will be
In figure the values of Rx and Cx are
The term 'Poisson's ratio' is connected with
A dynamometer wattmeter is connected in ac circuit. The measured power is
Which of the following measurements using a dc potentiometer do not require standardisation of potentiometer?
Which of the following are needed both for protection and metering?
Magnetic flux density has the dimensions
Loss of charge method is suitable for medium resistances.
In two wattmeter method of 3 phase power measurement, when does one wattmeter read negative
Which of the following statement is correct for two wattmeters method of power measurement in 3 phase circuit?
A digital frequency counter can be converted to DVM by addition of a suitable
A meter with a resistance ofΩ and a full scale deflection of current of 1 mA is to be converted into voltmeter of 0 - 5 V range. The multiplier resistance should be
It is required to measure angular position. Out of the transducers
In a thermocouple temperature transducer, the output voltage is usually measured by
A dynamometer wattmeter is connected in ac circuit. The reading will be
The household energy meter is
A moving iron instrument gives correct reading when used at
The speed transducer using a drag cup rotor has the main advantage of
A voltmeter using thermocouples measures
A standard cell of 1.V is used with a slide wire potentiometer. The balance was obtained atcm. When an unknown emf was connected, the balance was obtained atcm. The magnitude of unknown emf is
Induction wattmeter can be used in
Assertion (A): Wien bridge can be used for measuring frequency.
Reason (R): A frequency meter forHz system has a frequency range oftoHz.
Consider the following operation in respect of Wheatstone bridge (Kb, denotes battery key, Kg denotes galvanometer key)
The power input and output in a device areW andW with each reading in doubt by ±W. The percentage uncertainty in losses is
If eddy current damping is to be used, the disc of instrument should be
Which of these has poor overload capacity?
Two voltmeters 0-V each having resistances of 5 kΩ andkΩ respectively and are connected in series. To ensure that neither of them goes beyond scale the total voltage which can be applied should be less than
A meter coil has a resistance ofΩ and a full scale deflection current ofmA. To convert it into a voltmeter of 0-V range, the series resistance should be
Which of these has a magnetic brake?
The volt ratio box is basically a
A sinusoidal ac voltage of amplitudeV is applied to a rectifying device which offersΩ resistance in forward direction and infinite resistance in backward direction. A moving coil ammeter is also connected in the circuit. The reading of ammeter will be
In figure the bridge is balanced when Z4 is
The scale of moving iron instrument is linear.
LVDT is a
In 3 phase power measurement by two wattmeter method, both wattmeters had equal reading. The power factor of load is
Amm long conductor has a resistance ofΩ. The change in resistance is 13.3 Ω and change in length is 1.6 mm under tension. The gauge factor is
Two numbers are± 5 and±The sum of the numbers with range of doubt is
Assertion (A): Schering bridge is a low voltage bridge.
Reason (R): Schering bridge is very commonly used for measurement of capacitance.
A variable reluctance tachometer hasteeth on rotor. The speed of shaft on which it is mounted inrpm. The frequency of output pulses is
With a variable reluctance tachometer havingrotor teeth the count readscounts per minute. The speed in RPM is
When measuring phase angle between two waves using a CRO, the time base generator is connected to
A 0-V voltmeter has an accuracy of 0.of full scale reading. If voltage measured isV, the error is
In Schering bridge, the potential of detector above earth potential is about
Which instrument is based on induction principle?
Measuring of unknown voltage with a dc potentiometer loses its advantage of open circuit measurement when
It is required that a strain gauge has gauge factor ofThe proper strain gauge is
The dimensions of EMF are
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