Question

A laboratory balance shows a mass reading even when no object is placed on the pan. What is the main cause of this error?

Options

• Random fluctuation in readings

• Zero error due to a faulty instrument

• Error due to improper experimental method

• Personal error due to the observer’s habit

Answer 1

Zero error due to a faulty instrument

Explanation:

Showing a reading when the true value is zero is a zero error, which is an instrumental systematic error caused by a defect or poor calibration of the balance.