MEASUREMENT SHORT ANSWERS:- In this post, we have posted some short type questions and answers on instruments of Electrical and electronics measurements
Q1. What are absolute Instruments ?
Ans:- These are the instruments that indicate the value of a quantity being measured in terms of the deflection of the needle and 0 constant
No Calibration is needed as no comparison is required.
Q2. What Do You mean by secondary Instruments ?
Ans:- These instruments are calibrated by comparison with the absolute instrument. The magnitude of the quantity can be read directly from the calibrated scale. All most all the general in general use such as ammeter voltmeter, wattmeter, watt-hour, frequency meter, and power factor meter, etc belong to this class.
Q3. Define analog instruments ?
Ans:- The analog instrument is the instrument whose output is the Continuous function of time and they have a constant relation to the input. The Physically quantity is like voltage. Current, power, and energy are measured through analog instruments.
Q4. Define digital instruments ?
Ans:- Digital instruments are composed of logic circuits that measure the quantities. Due to several advantages of digital instruments such as high speed, errorless results, better resolution, and greater accuracy analog instruments. The popularity of digital instruments is increasing rapidly.
Q5. What are Deflecting Instruments ?
Ans:- The measurements in which the measured quantity produces Physical effects. which deflect or displace the moving System of the instruments is known as the deflecting instrument.
Q6. What are non – deflecting instruments?
Ans:- An instrument in which zero or Null indication determines the magnitude of a quantity, Such type of instrument is called the Null instrument. It uses a null detector which indicates the null condition When the measured quantity and the opposite quantity are the same.
Q7. What are integrating instruments?
Ans:- These instruments measure and read the total amount of energy supplied to a circuit in a given time.
Q8. What are indicating instruments ?
It consists of essential systems :
A detecting system:- Which provides the necessary deflecting torque.
A controlling system:- which offers the necessary restoring torque.
A damping system:- which helps the pointer to come quickly to the deflected positions.
Q9. Define recording instruments?
Ans:- These instruments are those which instead of indicating by pointer or scale give a continuous record of the variation of the electrical quantity, over a selected period. The moving system carries an ink pen that rests lightly on a chart or graph and moving uniformly to record variations.
MEASUREMENT SHORT ANSWERS