An instrument which detects electric current is known as?

An instrument which detects electric current is known as?
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1 Answer

Answer :

An instrument which detects electric current is known as galvanometer.

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When electric current passes through a metallic conductor, its temperature rises. This is due to?

Description : When electric current passes through a metallic conductor, its temperature rises. This is due to?

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Description : Electric current passing through the circuit produces?

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Eddy current damping cannot be used for moving iron instrument because

Description : Eddy current damping cannot be used for moving iron instrument because

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The gravity controlled instrument has crowded scale because current is proportional to?

Last Answer : The gravity controlled instrument has crowded scale because current is proportional to sine of deflection angle.

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Electric Current

Description : Electric Current

Last Answer : Electric current is the flow of charges. The electrons flow from higher density area of electrons to lowers density area of electrons. The terminal of battery which we called positive terminal of ... circuit is called electric current. The unit of electric current is Coulomb per Second or Ampere.

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Description : A) Watt B) Volts C) Farad D) Ampere

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Description : State various effects of electric current and explain any one.

Last Answer : Effects of Electric Current:  1. Magnetic Effect: When a current is passed through a conductor, magnetic field is produced round the conductor. Due to this field when current carrying ... The rise in temperature is converted into elongation of hot wire element causes displacement of pointer. 

What is the direction of flow of electric current in an electric circuit?

Description : What is the direction of flow of electric current in an electric circuit?

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How can a magnetic field be used to generate an electric current?

Description : How can a magnetic field be used to generate an electric current?

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The filament of an electric bulb is made of?

Description : The filament of an electric bulb is made of?

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Electric pressure is also called?

Description : Electric pressure is also called?

Last Answer : Electric pressure is also called voltage.

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Description : When current flows through heater coil it glows but supply wiring does not glow because?

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In the case of direct current?

Description : In the case of direct current?

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When one leg of parallel circuit is opened out the total current will?

Description : When one leg of parallel circuit is opened out the total current will?

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The insulation on a current carrying conductor is provided?

Description : The insulation on a current carrying conductor is provided?

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What are the test and measuring instrument required in an Electrical depots?

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List two advantages of PMMC instrument.

Description : List two advantages of PMMC instrument.

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need of calibration and explain the procedure to calibrate the instrument.

Description : need of calibration and explain the procedure to calibrate the instrument.

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feature of PMMC instrument.

Description : feature of PMMC instrument. 

Last Answer : Consumes less power Great accuracy. High torque to weight ratio

Write any four advantages of instrument transformer.

Description : Write any four advantages of instrument transformer.

Last Answer : Advantages of instrument transformer: 1. Extension of instrument range is possible. 2. Isolation of instruments from high voltage side. 3. Power loss is less as compared to shunts and multipliers. 4 ... measurement. 5. It is economical method of range extension. 6. Increases in safety of operator.

State the meaning of secondary instrument. Classify secondary instruments.

Description : State the meaning of secondary instrument. Classify secondary instruments.

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Description : State the function of former and control spring in PMMC instrument.

Last Answer : Function of Former: To support the coil and provide eddy current damping.  Function of Control Spring: To provide control torque or force and in some instruments springs can be used as current leads.

‘PMMC instrument is not suitable to measure AC quantity’. State the reason.

Description : ‘PMMC instrument is not suitable to measure AC quantity’. State the reason.

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Describe spring control method of producing controlling torque in measuring instrument. Write any two properties required for spring material.

Description : Describe spring control method of producing controlling torque in measuring instrument. Write any two properties required for spring material.

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Name the different torque and their function in measuring instrument.

Description : Name the different torque and their function in measuring instrument.

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Give the classification of the errors used in measuring instrument & state the reason for their occurrence.

Description : Give the classification of the errors used in measuring instrument & state the reason for their occurrence.

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Name the material used for :- (i) Moving coil (ii) Permanent magnet in PMMC instrument.

Description : Name the material used for :- (i) Moving coil (ii) Permanent magnet in PMMC instrument.

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State the meaning of absolute instrument and secondary instrument.

Description : State the meaning of absolute instrument and secondary instrument. 

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State the advantages of instrument transformer in using for extension of range of meters.

Description : State the advantages of instrument transformer in using for extension of range of meters. 

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Explain magnetic effect employed in measuring instrument.

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State the function of controlling torque in electrical measuring instrument.

Description : State the function of controlling torque in electrical measuring instrument.

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Explain construction & working of attraction type M.I. instrument with neat diagram.

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Why energy meter is integrating type measuring instrument?

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Write any two advantages of MI type instrument.

Description : Write any two advantages of MI type instrument.

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State working principle of PMMC instrument.

Description : State working principle of PMMC instrument.

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Compare PMMC & MI instrument.

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A Pyrheliometer is an instrument to measure :

Description : A Pyrheliometer is an instrument to measure :  (A) temperature of solar photovoltaic cell  (B) intensity of direct solar radiation at normal incidence  (C) intensity of indirect solar radiation  (D) efficiency of a solar photovoltaic cell

Last Answer : A Pyrheliometer is an instrument to measure : intensity of direct solar radiation at normal incidence 

In a PMMC instrument, the damping provided is :

Description : In a PMMC instrument, the damping provided is :  (A) air damping (C) eddy current damping (B) fluid damping (D) magnetic damping using a magnet

Last Answer : In a PMMC instrument, the damping provided is : eddy current damping 

The largest change of input quantity for which there is no output of instrument is called ______

Description : The largest change of input quantity for which there is no output of instrument is called ______ A) Dead time B) Dead input C) Dead output D) Dead zone

Last Answer : The largest change of input quantity for which there is no output of instrument is called Dead zone

A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an

Description : A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is (A) 1 Ω (B) 1.001 Ω (C) 0.5 Ω (D) 10 Ω

Last Answer : A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is 1.001 Ω

Identify the instrument that does not exist (A) Dynamo-meter type ammeter (B) Dynamo-meter type

Description : Identify the instrument that does not exist (A) Dynamo-meter type ammeter (B) Dynamo-meter type wattmeter (C) Moving-iron voltmeter (D) Moving-iron wattmeter

Last Answer : Identify the instrument that does not exist (A) Dynamo-meter type ammeter (B) Dynamo-meter type wattmeter (C) Moving-iron voltmeter (D) Moving-iron wattmeter

Instrument transformers are?

Last Answer : Instrument transformers are potential transformers, current transformers.

The rectifier instrument is not free from?

Last Answer : The rectifier instrument is not free from frequency error.

A multirange instrument has?

Last Answer : A multirange instrument has multiple shunt or series resistances inside the meter.