# What is the reading in the screw gauge shown below if it has a least count of 0 01 mm?

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## What is the least count of screw gauge?

Figure 6: Screw Gauge using micrometer

It means that for one complete rotation of the thimble scale, 0.5 mm distance is traveled by the spindle. There are 50 divisions on circular scale. The least count will be 0.01 mm calculated as below.

## What do you mean by least count of screw gauge is 0.01 mm?

The least count of screw-gauge is 0.01 means it is 100 times more accurate than a meter scale.

## What is the reading of micrometre screw gauge shown in Figure least count of screw gauge is 0.01 mm?

Least count of the micrometer screw gauge = Pitch of screw / No. of circular scale division = 1 mm / 100 = 0.01 mm. Hence the corrected reading is 4.78 mm.

## What is the least count of screw gauge and Metre scale?

The scales – vernier callipers, metre scale and screw gauge has the least counts: 0.1 mm, 1 mm, 0.01 mm respectively.

## How can the least count of a screw gauge be decreased?

The least count of a screw gauge can be decreased by increasing the pitch and decreasing the total number of divisions on the circular scale .

## How do I calculate least count?

Mathematically a measurement instrument Least Count is calculated by dividing main scale reading by the total number of divisions on the main scale. And if the instrument also has a Secondary scale. Then instrument LC is the ratio of main scale L.C. and number of divisions on the secondary scale.

## What do you know about least count?

The smallest value that can be measured by the measuring instrument is called its least count. Measured values are good only up to this value. The least count error is the error associated with the resolution of the instrument. A metre ruler may have graduations at 1 mm division scale spacing or interval.

## What is the least count of screw gauge in centimeters?

The minimum length that can be measured using a screw gauge is known as the least count of that screw gauge. Similarly, some screw gauges have a 1mm pitch with 100 divisions on the circular scale. ∴ least count = 1 / 100 = 0.01mm Hence, the least count of micrometer screw gauge is 0.01mm or 0.0001cm.

## What is the reading of the micrometre?

The micrometer is an extremely precise measuring instrument; the reading error is 1/200 mm = 0.005 mm. Use the rachet knob (at the far right in the picture above) to close the jaws lightly on the object to be measured. It is not a C-clamp! When the rachet clicks, the jaws are closed sufficiently.

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## What is the reading of the micrometre screw gauge shown in the figure?

That means the final reading of the micrometer screw gauge is \$2.30,mm\$.

## What type of error is shown in the figure shown screw gauge?

Figure (i) shows the zero error reading when the screw gauge is closed, figure (ii) the reading when the screw gauge is being used to measure the diameter of a ball-bearing.

## What is the least count of main scale?

Its vernier scale is divided into 10 divisions which coincides with 9 divisions of the main scale.

## When a screw gauge of least count 0.01 mm is used to measure the diameter of a wire?

When a screw gauge with a least count of 0.01 mm is used to measure the diameter of a wire, the reading on the sleeve is found to be 1 mm and the reading on the thimble is found to be 27 divisions.

## Which of the following has lowest least count?

Hint: Least Count of an instrument is the smallest change or value of a physical parameter an instrument can measure or detect. So, the screw gauge has minimum least count.