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Question

While measuring the length of an object, if the zero mark of a scale does not coincide with one of the ends of the object, then such an error is called _____ error.

A
parallax
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B
zero
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C
instrumental
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D
(a) and (b) above.
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Solution

The correct option is B zero
When the zero mark on the scale exactly coincides with one end of the object, then the measurement is said to have no zero error. However, if there is a shift, zero error will be equal to the length by which the end of the object has shifted from the zero mark.

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