List of devices
- Architect’s scale.
- Caliper.
- Diagonal scale.
- Engineer’s scale.
- Feeler gauge, used in metal working to measure size of gaps.
- Gauge blocks.
- Gunter’s chain.
- Measuring rod.
What instruments are used to measure length?
Length, or the distance between two lengths: Tools used to measure length include a ruler, a Vernier caliper, and a micrometer screw gauge. Vernier calipers and micrometer screw gauges are more precise and can be used to measure the diameter of objects like pipe and wire.
What are three instruments used to measure length?
the three instruments used to measure length,in increasing order of accuracy are vernier calliper, micrometh screw gauge and meter rule.
Which instrument is not used to measure length?
Vernier callipers, screw gauge and spherometer are used for the measurement of length whereas atomic clock is used for the measurement of time.
What is the most precise instrument for measuring length?
Screw gauge has minimum least count of 0.001cm. Hence, it is most precise instrument.
Which of the following instruments is the most accurate?
1. Which of the following instrument is of the highest accuracy? Explanation: Universal measuring instrument is of the highest accuracy due to the presence of sensors, micro switches and microprocessors.
Which of the following instrument is used for accurate measurement and why?
A potentiometer of longer length is used for accurate measurement.
Which instrument is more accurate in measuring the dimensions of an object?
Although screw gauge is the more accurate device as compared to vernier callipers, when we need to find the internal diameter of a hollow body then it can’t be measured with the help of screw gauge, in such cases only Vernier callipers are used.
Which instrument is best for measure the EMF of cell?
potentiometer
answer is potentiometer. as a voltmeter draws some current in cell it can not givethe accurate rating. a potentiometer is the best option as during the measurement by potentiometer no current flows through it.
Which instrument is used to measure potential difference?
Voltmeter
The correct answer is Voltmeter. A voltmeter is an instrument used to measure the potential difference. A voltmeter is used between two points in an electric circuit to measure the potential difference between those two points.
Which instrument is used for measuring EMF?
Meters. An EMF meter is a scientific instrument for measuring electromagnetic fields (abbreviated as EMF).
How is a potentiometer superior to that of a voltmeter?
The potentiometer is preferred over voltmeter when there is a measurement of emf of the cell because the potentiometer does not draw any current as it is a null device.This is the reason why potentiometer is preferred over voltmeter in order to get the actual measurement of emf.
Which of the followings is most preferable and accurate instrument for measurement of voltage of a voltage source?
Hence the option (A) Potentiometer will be correct.
What does a potentiometer measure?
The potentiometer operates by comparing the voltage to be measured with known voltage; it is used to measure very low voltages. The electronic voltmeter uses amplification or rectification (or both) to measure either alternating- or direct-current voltages.
Which instrument measure the distance covered by the vehicle?
odometer
speedometer, instrument that indicates the speed of a vehicle, usually combined with a device known as an odometer that records the distance traveled.
Which instrument is used for measuring blood pressure?
To measure blood pressure, your doctor uses an instrument call a sphygmomanometer, which is more often referred to as a blood pressure cuff. The cuff is wrapped around your upper arm and inflated to stop the flow of blood in your artery.
How does a potentiometer measure EMF?
Using a potentiometer, we can determine the emf of a cell by obtaining the balancing length l. Here, the fall of potential along the length l of the potentiometer wire is equal to the emf of the cell, as no current is being drawn from the cell. Then, or, ; where k is the potential gradient along the wire.
What is galvanometer used for?
galvanometer, instrument for measuring a small electrical current or a function of the current by deflection of a moving coil.
Can voltmeter measure EMF?
An ideal voltmeter cannot measure the electromotive force of the cell. Current flows from higher potential to lower potential in an electric circuit.
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