In a Ballistic galvanometer
Panel type instruments are used in
Assertion (A): The speed of a shaft can be measured by using a dc tacho generator.
Reason (R): A two phase servometer can also be used as a speed transducer.
Which is the displacement transducer with excellent sensitivity, linearity and resolution?
The advantage of semiconductor strain gauge over resistance strain gauge is
In a phase shifting transformer the currents in the two stator winding are in phase.
The scale of thermocouple instrument is linear.
The pointer of an indicating instrument should be
The electromagnets of an induction wattmeter
In a vibrating reed frequency meter the natural frequency of two adjacent reeds have a difference of
In low power factor wattmeter, the pressure coil is connected
Burden of an instrument transformer is expressed in
It is required to measure a low magnitude high frequency current. The proper instrument is
A Q meter uses the principle of
Magnetic flux can be measured by
The signal to noise ratio in telemetry should be better than
Two resistances are R1 =±and R2 =± 5%. If they are connected in parallel, the limiting error in percent will be
Which of the following devices should be used for accurate measurement of a low dc voltage?
Bridge circuits using RTD in temperature measurement usually employ 3 lead system so as to obtain
The numbers of accelerating anodes in a CRO is
It is required to measure pressure using LVDT. The additional device needed is
If low pressure of 10-6 mm of Hg is required to be measured, we should use
For measuring current at a high frequency we should use
The operating voltage of a megger is about
In semiconductor strain gauge
Assertion (A): Electrodynamic instrument is not used as ammeter or voltmeter.
Reason (R): Electrodynamic instrument is more costly than PMMC and moving iron instrument.
Gauge factor of a strain gauge is
To measure an emf by dc potentiometer it is necessary to standardise the potentiometer with the help of a standard cell.
Assertion (A): The sign and magnitude of displacement can be measured by an LVDT.
Reason (R): LVDT is based on the principle of mutual inductance.
If σ is standard deviation, variation is
The stator of phase shifting transformer for use in conjunction with an ac potentiometer has a
Consider the following statements regarding phase sensitive detector
Which of the following quantities have same dimension in emu and esu?
In a dynamometer instrument, the moving coil is pressure coil.
A transducer must have
A moving iron instrument can be used for dc as well as ac.
Two wattmeter method of 3-phase power measurement can be used to find
An ohmmeter is a
Four terminal approach is used in measuring low resistance because it
Consider the following statements regarding electro-dynamometer type indicating instrument
It can be used for measuring
An ac bridge uses galvanometer as detector.
Assertion (A): Capacitance effect can be used to measure thickness of sheets, displacement and pressure.
Reason (R): Capacitance between two plates depends on the area of plates, distance between plates and permittivity of medium.
Which of the following transformers has low primary current?
In Maxwell's bridge the unknown inductance is measured by comparing it with a standard capacitor.
An electrodynamometer instrument has the advantage of
In a Weston synchronoscope, the moving coil is connected across
Load cell uses
If two time varying signals of equal magnitude and zero phase displacement are applied to X and Y plates respectively; of CRO, the display will be
The multiplier resistance and meter coil in a voltmeter are in
Assertion (A): Double Kelvin's bridge is used to measure low resistances.
Reason (R): In low resistance, the contact and lead resistances are very important.