96 views
What do you mean by secondary instruments?

1 Answer

Answer :

The instruments which will give the direct readings are called secondary instruments
Like 0 like

Please log in or register to answer this question.

Related questions

79 views

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

Last Answer : Secondary instruments: - Gives reading directly of the quantity being measured. - Calibrated with respect to absolute instruments  Classification of Secondary instruments:  1. Depending on the ... on permissible error: i) Standard meters ii) Substandard meters iii) First grade instruments.

1 answer
94 views

Description : Compare primary and secondary instruments.

Last Answer : Primary instruments  Secondary instruments  Gives magnitude of quantity in terms of physical constants of instrument  Gives reading directly of the quantity measured.  Need no calibration  ... .  e.g. magnetic meter, induction meter, hotwire meter and electrostatic meter 

1 answer
2.6k views

Description : Permanent magnet moving coil instruments are used for

Last Answer : PMME are mostly used for measuring voltage and current.

2 answers
696 views

Description : The use of _____ instruments is merely confined within laboratories as standardising instruments.

Last Answer : The use of absolute instruments is merely confined within laboratories as standardizing instruments.

1 answer
102 views

Last Answer : Commonly used instruments in power system measurement are induction.

1 answer
133 views

Last Answer : Operating torques in analogue instruments are deflecting, control and damping.

1 answer
301 views

Last Answer : The power factor of a single phase load can be calculated if the instruments available are three ammeters or three voltmeters.

2 answers
93 views

Last Answer : The switch board instruments should be mounted in vertical position.

1 answer
276 views

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

1 answer
112 views

Last Answer : According to application, instruments are classified as switch board, portable.

1 answer
307 views

Last Answer : The use of absolute instruments is merely confined within laboratories as standardizing instruments.

1 answer
56 views

Description : How instruments are classified?

0 answers
74 views

Description : What is electrical instruments?

0 answers
192 views

Description : Define: primary and secondary distribution system 

Last Answer : i) Primary Distribution:  It is a 3-phase, 3-wire transmission line connected in between receiving substation to Distribution substation. OR It is link between receiving substation & ... substation to consumer line. OR It is link between distribution transformer substation & consumer. 

1 answer
128 views

Description : State the losses in secondary distribution system. 

Last Answer : The losses in secondary distribution system: a) Technical losses: 1. Due to poor voltage 2. Due to unbalance load 3. Due poor quality of transformer & its components 4. Due to poor quality ... of induction type of energy meter. 3. Lack of administration. 4. Energy theft 5. Unmetered supply

1 answer
120 views

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

Last Answer : Absolute instruments:   These instruments read the quantity under measurement indirectly i.e. in terms of deflection, degrees and meter constant. The actual value under measurement can be calculated ... of operation (b) Depending upon permissible percentage error. (c) Depending upon application.

2 answers
96 views

Description : Why CT is never operated with an open secondary ?

Last Answer : CT secondary should never be kept open because it will cause saturation of the core to a high level and very high voltage will appear across the secondary which can breakdown the insulation. One terminal of PT secondary is always grounded to avoid capacitive induction and for human safety

2 answers
6.2k views

Description : Write difference between absolute & secondary instrument.

Last Answer : Absolute Instrument Secondary Instrument 1. These give magnitude of quantity in terms physical constants of instruments 1. These give reading directly of the quantity at the time of ... Raleigh current balance. 6. Examples - ammeter, voltmeter, amperehour meter, wattmeter etc.

1 answer
653 views

Description : Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary

Last Answer : Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary

1 answer
1.3k views

Description : Increasing the number of turns of wire on the secondary of a transformer will  (A) Decrease the secondary current (B) Increase the primary current (C) Have no effect on the secondary current (D) Increase the secondary current

Last Answer : Increasing the number of turns of wire on the secondary of a transformer will Decrease the secondary current 

1 answer
233 views

Description : A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary?  (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts

Last Answer : A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary?  (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts

1 answer
237 views

Description : If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then  (A) zero sequence currents are present on both sides of the transformer  (B) ... side  (D) zero sequence currents are present on the primary side but not on the secondary side

Last Answer : If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then zero sequence currents are absent on both sides of the transformer 

1 answer
123 views

Description : What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known

Last Answer : What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known

1 answer
170 views

Description : When secondary of a current transformer is open-circuited its iron core will be?

Last Answer : When secondary of a current transformer is open-circuited its iron core will be hot because of heavy iron losses taking place in it due to high flux density.

1 answer
112 views

Description : The secondary of a current transformer is always short-circuited under operating conditions because it?

Last Answer : The secondary of a current transformer is always short-circuited under operating conditions because it avoids core saturation and high voltage induction.

1 answer
286 views

Description : In a transformer the resistance between its primary and secondary should be?

Last Answer : In a transformer the resistance between its primary and secondary should be infinity.

1 answer
2 views

Description : List of Scientific Instruments

Last Answer : Hydrometer measures humidity Barometer measures atmospheric pressure Purity of milk is measured by lactometer Fathometer measures the depth of oceans. Sextant is used for measuring ... regulate the temperature to a particular degree. Viscometer: is an instrument to measure viscosity.

1 answer
112 views

Description : Electrical Measuring Instruments

Last Answer : Electrical Measuring Instruments

2 answers
190 views

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. 

1 answer
123 views

Description : calibration and the need of calibration for measuring instruments.

Last Answer : Calibration - It is a process of estimating the value of a quantity by comparing that quantity with a standard quantity.    Need of calibration: - Calibration defines the accuracy and ... aim of calibration is to minimize any measurement uncertainty by ensuring the accuracy of test equipment.

1 answer
72 views

Description : Advantages of digital instruments

Last Answer : 1. They are having high input impedance, so there is no loading effect 2. They are having higher accuracy 3. An unambiguous reading is obtained 4. The output can be interfaced with external equipment 5. They are available in smaller size . 

1 answer
76 views

Description : State the effect of dead zone on instruments.

Last Answer : It is the largest change in input during which the output remains constant. So during dead zone, even if input changes, output remains the same.

1 answer
100 views

Description : Define: i) Range ii) Span of instruments

Last Answer : i) Range: It is defined as the difference between Greatest and Smallest value of the data or reading of the instrument.  ii) Span: It is defined as the algebraic difference between the upper and lower range values

1 answer
418 views

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. 

1 answer
114 views

Description : State two purposes of calibration of measuring instruments.

Last Answer : Purposes of calibration of measuring instruments: - The purpose of calibration is to ensure that readings of an instrument are consistent with other instruments. It is also important in determining the ... will need to be calibrated periodically to make sure it can function properly and safely. 

1 answer
149 views

Description : List three types of errors in measuring instruments. Give reasons of occurring for any one of them.

Last Answer : Types of errors in measuring instruments:  A) Gross error: These are due to mistakes on the part of person using the instrument.  B) Systematic Error: i) Instrumental Error: These ... multiplying factor.  C) Random error: These persist even after gross and systematic errors are removed.

1 answer
197 views

Description : Define following terms related to measuring instruments: i) Sensitivity ii) Selectivity.

Last Answer : i) Sensitivity: It is the ratio of the change in output signal to the change in input signal of quantity being measured.  ii) Selectivity: It is the term to describe fulfillment of the requirements of measurement by an instrument to be suitable for use in a given situation. 

1 answer
1.1k views

Description : List out any four effects of electric current used in measuring instruments & write name of meter working on it.

Last Answer : Effects of Electric Current used in measuring instruments:  1. Magnetic Effect: PMMC and Moving Iron type Ammeters, voltmeter and Dynamometer type wattmeters etc.  2. Electromagnetic induction ... . Electrostatic effect: Voltmeters.  5. Hall Effect: Flux meter, Poynting vector wattmeter.

1 answer
87 views

Description : Describe systematic errors in measuring instruments. 

Last Answer : Systematic errors: -  ➢ Instrumental Error: These errors are caused due to the mechanical structure of measuring instrument.  a) Inherent shortcomings of instruments: Instrument may read ... or electrostatic fields.  ➢ Observational Error: Parallax errors, incorrect multiplying factor. 

1 answer
174 views

Description : State the material used for moving coil and former for PMMC instruments. 

Last Answer : Material Used for Moving Coil and Former for PMMC Instruments:  Material used for moving coil: Copper  Material used for Former: Aluminium

1 answer
142 views

Description : List any four effects employed in measuring instruments.

Last Answer : Effects Employed in Measuring Instruments: 1. Magnetic Effect 2. Electromagnetic induction 3. Heating effect 4. Electrostatic effect 5. Hall Effect 

1 answer
165 views

Description : Standard Commands for Programmable Instruments (SCPI)

Last Answer : Standard Commands for Programmable Instruments (SCPI) SCPI stands for Standard Commands for Programmable Instruments it is often pronounced as Skippy. SCPI is a instrument language that control the ... is for storing data in instrument. Display : for presentation.

2 answers
4 views

Description : Does anyone know how one gets to perform at Carnegie Hall?

Last Answer : Practice. Practice. Practice.

1 answer
0 views

Description : What is an object/item/instrument that you feel one with?

Last Answer : My clarinet.

1 answer
0 views

Description : Why don't violins have frets?

Last Answer : answer:To allow the player to hit quarter and half notes. It also allows the instrument to be tuned in non-equal intervals. Also, you can get fretted violins (supposed to be good for new players).

1 answer
0 views

Description : This may seem a stupid question, but how does a left-handed string player play in an orchestra?

Last Answer : They are generally seated at the other end of the line. if there are more than one, then they sit together.

1 answer
2 views

Description : How do I sell a cello in the bay area or seattle area?

Last Answer : I’ve always had good luck with Craigslist, but as on any such site, you’ve got to be really careful to find out the buyer is legit. I NEVER sell stuff anymore to anyone outside my immediate geographical area.

1 answer
1 view

Description : What banjo should I buy?

Last Answer : Buy one that sounds good to you. It’s the same for any instrument.

1 answer
0 views

Description : How much should a good 4/4 violin cost for a beginner?

Last Answer : Even for a beginner a good one will be upwards of 700–800 dollars. You could find one for 50–100 I’m sure, but it would not sound good at all and you don’t want to start learning the notes with a bad sounding instrument as that is what your ear will get used too.

1 answer
0 views

Description : Has anyone learned to play a musical instrument when you were older? I'm interested in those where this would have been their first musical instrument.

Last Answer : Define “older” I changed instruments later in life from guitar to violin… I suppose that does not count though.

1 answer
...