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Q: Why is it essential to measure zero error in spherometer?
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Why don't you add or subtract the zero error from the reading when you measure depth from vernier caliper?

If you are doing your job properly, you DO!


How do you find zero error of screw gauge?

Take a measurement with nothing in the gauge. That reading is the zero-error.


What is Zeroing Error?

Suppose say you have plastic rule new one. There you will be having zero marking. When you have to measure the length of a rod then you would keep zero marking at one end of the rod and the marking where the other extreme of the rod is taken to be length of the rod. say it is at 4 cm. So 4cm is the length. And suppose the ruler is an old one whose edge got damaged. Now you don't have zero marking so visible there. So you have keep the end of the rod at say 1 cm marking. Now the error that we commit is known as zero error. Here the error is positive. ie +1 cm. So as the other end of the rod is at 5cm marking then the correct length is got by applying zero correction. As zero error is +1 cm, then zero correction would be -1 cm So the correct length 5-1 ie 4 cm. Same way in case of vernier, if zero of vernier is at left side of zero of main scale, then the zero error is negative. If zero of vernier is right side of zero of main scale then error is +ve as we have seen in the earlier old ruler case. Same way in case of screw gauge as the head scale zero is above pitch line then error is negative and as head scale zero is below pitch line then zero error is positive.


What is zero correction?

the correction which is made to get correct measurement after zero error


What does mean zero error reading of vernier calipers?

The scale doesn't start at zero, so you need to compromise or you get a systematic error.

Related questions

Why is zero error not considered in spherometer?

No, you have not any knowledge about spherometer. In spherometer also, similar to other measuring instruments zero error should be considered every time; in order to achieve accurate value.


What is common error associated with tape measure?

Zero error and parallax error


What is zero error in vernier caliper?

The zero error of a measuring instrument is the measure that it shows when it should actually be showing zero.


Why don't you add or subtract the zero error from the reading when you measure depth from vernier caliper?

If you are doing your job properly, you DO!


How do you find the zero error and zero correction in sgrew gauge?

we can find the zero error by closing the jaw of screw guage if the zero of main scale(MS) is concide with the zero of circular scale (CS) there is no zero error and if they are not concide there is a zero error in screw guage .


Define the term zero error of vernier calliper?

The zero error of vernier calliper is defined as :-The zero error is equal to the distance between the zero of the main scale and the zero of the vernier scale.


What is Positive zero error?

if the zero of vernier scale lies on the right side of the zero of the main scale , then error is known as a positive error .


Zero error of a spring balance?

zerro error in a spring balance affects the accuracy in the weight. To find zero error in spring balance, you have to first find the least count of the spring balance and then suspend it freely, if the outcome is +1, the zero error is +1 and if it is -1 ,the zero error is -1.


What is a zero error?

if the zero line of vernier scale is not conciding with main scale the zero error exists.Knowing the zero error necessary correction can be made to find correct measurement..Such a correction is called zero correction


How do you find zero error of screw gauge?

Take a measurement with nothing in the gauge. That reading is the zero-error.


What kind of an error in c plus plus is dividing by zero?

The answer is in your own question. A divide by zero error is a divide or mod by zero type of error. In MSVC++ it has the error code C2124. Ultimately it is a fatal error and will either produce a compile time error or throw an unhandled exception at runtime.


What is Zeroing Error?

Suppose say you have plastic rule new one. There you will be having zero marking. When you have to measure the length of a rod then you would keep zero marking at one end of the rod and the marking where the other extreme of the rod is taken to be length of the rod. say it is at 4 cm. So 4cm is the length. And suppose the ruler is an old one whose edge got damaged. Now you don't have zero marking so visible there. So you have keep the end of the rod at say 1 cm marking. Now the error that we commit is known as zero error. Here the error is positive. ie +1 cm. So as the other end of the rod is at 5cm marking then the correct length is got by applying zero correction. As zero error is +1 cm, then zero correction would be -1 cm So the correct length 5-1 ie 4 cm. Same way in case of vernier, if zero of vernier is at left side of zero of main scale, then the zero error is negative. If zero of vernier is right side of zero of main scale then error is +ve as we have seen in the earlier old ruler case. Same way in case of screw gauge as the head scale zero is above pitch line then error is negative and as head scale zero is below pitch line then zero error is positive.