The best and efficient damping in Analog instruments is : -

The best and efficient damping in Analog instruments is : - a) Air Friction damping b) Fluid Friction damping c) Eddy Current damping d) None of the above
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Answer :

The best and efficient damping in Analog instruments is : - Eddy Current damping

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Related questions

Damping torque used in energy meter is : -

Description :  Damping torque used in energy meter is : - a) Electrostatic b) Electro magnetic c) Eddy Current d) None

Last Answer : Damping torque used in energy meter is : - Eddy Current

In the time response analysis of control system, Damping Ratio is given by -

Description : In the time response analysis of control system, Damping Ratio is given by - a) Actual damping / Critical damping b) Critical damping /Actual damping c) ( Sum of the Actual damping and critical damping) /Actual damping d)( Difference of the Actual damping and critical damping) / critical damping

Last Answer : In the time response analysis of control system, Damping Ratio is given by -  Actual damping / Critical damping

A digital voltmeter uses an A/D converter which needs a start pulse, uses an analog comparator and has a...

Description : A digital voltmeter uses an A/D converter which needs a start pulse, uses an analog comparator and has a relatively fixed conversion time independent of the applied voltage. The A/D ... Successive Approximation Converter .b) Digital Ramp Converter c) Digital Slope Converter d) All the above

Last Answer : A digital voltmeter uses an A/D converter which needs a start pulse, uses an analog comparator and has a relatively fixed conversion time independent of the applied voltage. The A/D converter is : -  Successive Approximation Converter 

Data Acquisition system are used to measure and record analog signal in different ways i.e. : -

Description : Data Acquisition system are used to measure and record analog signal in different ways i.e. : -  a) Signals which originates from direct measurement of electrical quantities b) Signals which originate from the ... which oscillates in simple harmonic motion and dies out slowly. d) Both (a) and (b)

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Loading effect is principally caused by instruments

Description : Loading effect is principally caused by instruments   (a) High resistance (b) Low sensitivity (c) High sensitivity (d) High range

Last Answer : B

Thermocouple instruments can be used for a frequency range upto

Description : Thermocouple instruments can be used for a frequency range upto   (a) 100Hz (b) 5000 Hz (c) 1 MHz (d) 50 MHz and above 

Last Answer : Thermocouple instruments can be used for a frequency range upto 50 MHz and above 

Eddy current damping is normally used in the instruments of

Description : Eddy current damping is normally used in the instruments of (a) Induction type (b) Moving iron type (c) Permanent magnet moving coil type (d) Nothing can be said 

Last Answer : Permanent  magnetic  moving  coil  instrument.

In moving iron instruments, eddy current damping cannot be used as

Description : In moving iron instruments, eddy current damping cannot be used as  (a) They have a strong operating magnetic, field (b) They are not normally used in vertical position (c) They ... of a permanent magnet required for eddy current damping would distort the existing weak operating magnetic field

Last Answer : In moving iron instruments, eddy current damping cannot be used as The introduction of a permanent magnet required for eddy current damping would distort the existing weak operating magnetic field

Air friction damping is used in the instruments which is:

Last Answer : Air friction damping is used in the instruments which is: Moving iron

In majority of instruments damping is provided by?

Last Answer : In the majority of instruments, damping is provided by eddy currents.

What are the advantages of digital instruments over analog instruments?

Description : What are the advantages of digital instruments over analog instruments?

Last Answer : a. Human errors are avoided (comparative error) because the output is displayed in form of numbers.  b. Power consumption of digital meters are low as compared to analog meters. 

What are the two main classifications of analog instruments?

Description : What are the two main classifications of analog instruments? 

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A moving system force in an analog instruments which causes the moving system to deflect from its zero position.

Description : A moving system force in an analog instruments which causes the moving system to deflect from its zero position.

Last Answer : deflecting force

A moving system force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value

Description : A moving system force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value

Last Answer : controlling force

Which of the following forces does not act on the moving systems of analog instruments?

Description : Which of the following forces does not act on the moving systems of analog instruments?

Last Answer : an electrostatic force

Describe different types of errors in analog measuring instruments.

Description : Describe different types of errors in analog measuring instruments. 

Last Answer : Types of Errors in Analog Measuring Instruments: A) Gross error: These are due to mistakes on the part of person using the instrument. B) Systematic Error: It has three sub types as ... multiplying factor. C) Random error: These persist even after gross and systematic errors are removed.

Compare analog and digital instruments .

Description : Compare analog and digital instruments .

Last Answer : Parameter Analog Instrument Digital Instrument  1 Principle The instrument that displays analog signals is called as on analog instrument.  The instrument that displays ... , etc. Logical analyzer, signature analyzer, computers, microprocessor based instruments, etc. 

Explain the essential toques in analog type measuring instruments.

Description : Explain the essential toques in analog type measuring instruments.

Last Answer : List of torques in analog instruments:  1. Deflecting torque  2. Controlling / Restraining torque.  3. Damping torque.  1. Deflecting torque: To create deflection proportional to ... the speed higher will be the damping torque bringing the pointer to the equilibrium position quickly. 

The most efficient form of damping in an instrument is

Last Answer : The most efficient form of damping in an instrument is Eddy current.

Which one of the following frequency meter is suitable for measuring radio frequency?

Description : Which one of the following frequency meter is suitable for measuring radio frequency?   (a) Vibrating reed frequency meter (b) Weston frequency meter (c) Electrical resonance frequency meter (d) Heterodyne frequency meter 

Last Answer : Which one of the following frequency meter is suitable for measuring radio frequency?   (a) Vibrating reed frequency meter (b) Weston frequency meter (c) Electrical resonance frequency meter (d) Heterodyne frequency meter 

Which of the following factors limit the deflection of the pointer of a PMMC instrument of about

Description : Which of the following factors limit the deflection of the pointer of a PMMC instrument of about 90o?  1. Its damping mechanism  2. Linearity of magnetic field in which the coil moves  3. Control spring arrangement  4. ... Only 1 and 3 (b) Only 2 and 4 (c) Only 2 and 3 (d) Only 1 and 4 

Last Answer : Which of the following factors limit the deflection of the pointer of a PMMC instrument of about 90o?  1. Its damping mechanism  2. Linearity of magnetic field in which the coil moves  3. Control spring arrangement  4. ... Only 1 and 3 (b) Only 2 and 4 (c) Only 2 and 3 (d) Only 1 and 4 

Torque/weight ratio of an instrument indicates

Description : Torque/weight ratio of an instrument indicates   (a) Selectivity (b) Accuracy (c) Fidelity (d) Sensitivity

Last Answer : Torque/weight ratio of an instrument indicates Sensitivity

Wagner's earth devices are used in AC bridge circuits for

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Last Answer : Wagner's earth devices are used in AC bridge circuits for Eliminating the effect of earth capacitances

In a single phase induction energy meter, in order to obtain true value of energy, the shunt

Description : In a single phase induction energy meter, in order to obtain true value of energy, the shunt magnetic flux should lag behind the applied voltage by   (a) 90o (b) 0o (c) 45o (d) 60o

Last Answer : In a single phase induction energy meter, in order to obtain true value of energy, the shunt magnetic flux should lag behind the applied voltage by 90o

Gearing, blacklash, friction between moving parts and scale accuracies are generally known as

Description : Gearing, blacklash, friction between moving parts and scale accuracies are generally known as  (a) Instrument errors (b) Interference errors (c) Calibration errors (d) Interaction errors

Last Answer : Gearing, blacklash, friction between moving parts and scale accuracies are generally known as Instrument errors

If the distance of screen from a CRT to center of deflection plates is 15 cm, the length of

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The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is

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What is the line current of a circuit when the current transformer of 1000 : 5 rating measures 4 amp?

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Base 10 refers to which number system?

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A basic S -R flip-flop can be constructed by cross -coupling which basic logic gates : -

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