A student performing a physics experiment forget to calibrate the instrument used for experiment identify and briefly explain the type of error he is making

The type of error the student is making is a systematic error.

Systematic errors are caused by a flaw or bias in the experimental setup or equipment. In this case, the student forgot to calibrate the instrument used for the experiment, resulting in a systematic error. Calibration involves adjusting the instrument to ensure its measurements align with known standards or references. By not calibrating the instrument, the student introduces a systematic error into their measurements, causing them to be consistently off from the true values. This type of error cannot be eliminated by repeating the experiment or taking multiple measurements; it can only be corrected by calibrating the instrument and accounting for the bias introduced during the initial measurements.