The principle of operation of Q-meter is based on

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Answer :

The principle of operation of Q-meter is based on Series resonance.

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A reading of 120 is obtained when a standard inductor was connected in the circuit of a Q-meter and the

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Last Answer : Klystron operation is based on the principle of  Velocity modulation 

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Description : The operation of a ramp type Digital Voltmeter is based on the principle of (A) Voltage-to-current conversion. (B) Voltage-to-time conversion. (C) Current-to-time conversion. (D) Current-to-frequency conversion.

Last Answer : The operation of a ramp type Digital Voltmeter is based on the principle of Voltage-to-time conversion.

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Last Answer : 3

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Description : A moving coil of meter has 100 turns, and a length and depth of 10mm and 20mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carrier current capacity is 50 mA. The torque on the coil is

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Last Answer : The meter which does not have any component in it to provide control torque is Electrodynamometer for power factor measurement.

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Description : A 200 V, 5 A d.c. energy meter is tested at its marked ratings. The resistance of the pressure circuit is 8000 Ω and that of current coil is 0.1 Ω. The power consumed when testing the meter with phantom loading with current circuit excited by a 6 V battery is (A) 2.5 W (B) 5 W (C) 32.5 W (D) 35 W

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An ideal meter should have

Last Answer : An ideal meter should have Absolutely no effect on the circuit being measured.

In a moving iron meter, the deflecting torque is proportional to

Last Answer : In a moving iron meter, the deflecting torque is proportional to Square of the current through the coil.

Why is a MISC meter not recommended for DC measurement?

Last Answer : MISC meter not recommended for DC measurement because the error is high due to the hysteresis effect.

For high accuracy the meter has

Last Answer : For high accuracy the meter has Hand drawn scale.

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Last Answer : A moving coil instrument is used as an ohmmeter. The indicating scale of the meter will be Hyperbolic.

It is desired to convert a 0-1000A meter movement, with an internal ...

Description : It is desired to convert a 0-1000A meter movement, with an internal resistance of 100 ohms, into a 0-100mA meter. The required value of shunt resistance is about 

Last Answer : It is desired to convert a 0-1000A meter movement, with an internal resistance of 100 ohms, into a 0-100mA meter. The required value of shunt resistance is about 1 ohms.

In an energy meter braking torque is produced to

Last Answer : In an energy meter braking torque is produced to maintain steady speed and equal to driving torque

Various adjustments in an energy meter include

Last Answer :  Various adjustments in an energy meter include light load or friction, lag and creep, overload and voltage compensation.

Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to

Last Answer : Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to eliminate creeping at no load

To measure radio frequency, the suitable frequency meter is

Last Answer : To measure radio frequency, the suitable frequency meter is heterodoxy frequency meter.

In a dynamo-meter type of moving coil instrument a swamping resistance is provided in order to:

Last Answer : In a dynamo-meter type of moving coil instrument a swamping resistance is provided inorder to: Provide equal time constant for moving coil and fixed coil, when used for ac measurement

For measuring an unknown electrical quantity, select the meter with

Last Answer : For measuring an unknown electrical quantity, select the meter with Highest range and work down.

A Weston frequency meter is?

Last Answer : A Weston frequency meter is moving iron instrument.

In a Weston frequency meter, the magnetic axes of the two fixed coils are?

Last Answer : In a Weston frequency meter, the magnetic axes of the two fixed coils are perpendicular.

In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of?

Last Answer : In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of 0.5 Hz.

In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at?

Last Answer : In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at 120°.

In a single phase power factor meter the phase difference between the currents in the two pressure coils is?

Last Answer : In a single phase power factor meter the phase difference between the currents in the two pressure coils is exactly 90°.

The two pressure coils of a single phase power factor meter have?

Last Answer : The two pressure coils of a single phase power factor meter have the same dimensions and the same number of turns.

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Last Answer : A power factor meter has one current circuit and two pressure circuits.

The adjustment of position of shading bands, in an energy meter is done to provide?

Last Answer : The adjustment of position of shading bands, in an energy meter is done to provide friction compensation.

The multiplier and the meter coil in a voltmeter are in?

Last Answer : The multiplier and the meter coil in a voltmeter are in series.

The household energy meter is?

Last Answer : The household energy meter is an integrating instrument.

An induction meter can handle current up to?

Last Answer : An induction meter can handle current up to 100 A.

A moving-coil permanent-magnet instrument can be used as flux-meter?

Last Answer : A moving-coil permanent-magnet instrument can be used as flux-meter by eliminating the control springs.

What type of meter is used to measure current?

Description : What type of meter is used to measure current?

Last Answer : Ammeter

The induction of a high Q inductor can be measured by a

Last Answer : The induction of a high Q inductor can be measured by a Hay Bridge.

Integrating principle in the digital measurement is the conversion of

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Last Answer : Integrating principle in the digital measurement is the conversion of Voltage to frequency

Electrostatic instrument uses the principle of the variation of

Last Answer : Electrostatic instrument uses the principle of the variation of Capacitance with the voltage.

Wattmeter cannot be designed on the principle of

Last Answer : Wattmeter cannot be designed on the principle of moving iron instrument.

What is LCR meter? Draw digital LCR –Q meter block diagram.

Description : What is LCR meter? Draw digital LCR –Q meter block diagram.

Last Answer : An LCR meter is a type of electronic test equipment used to measure the inductance (L), capacitance (C), and resistance (R) of an electronic component. Block diagram digital LCR –Q meter