Can anyone explain me what is negative and positive zero error and their corrections? I am a little confused...
Answers
Positive zero error -the positive zero error is equal to the length between the zero mark of the vernier scale from the zero mark of the main scale.To find this error, we note that division of the vernier scale which coincides with any division of the main scale. The number of this vernier division when multipled by the least count of the vernier, gives the zero error .
Negative zero error - the negative zero error is equal to the length between the zero mark of the vernier scale from the zero mark of the main scale. To find this error,we note that division of the vernier scale which coincides with any division of the main scale. The number of this vernier division is subtracted from the total number of divisions on the vernier scale and then the difference is multiplied by the least count .
Correction due to zero error that is correct measurement with the vernier couplers have a zero error to get the correct reading the zero error with its proper sign is always subtracted from the observed reading . does the positive zero error get subtracted from the observed reading while the negative zero error gets added to the observed reading .
hope it helps........
