Q. Match the Column I (type of errors) with Column II (cause) and select the correct answer from the codes given below.
Column I Column II
A Instrumental errors 1 External conditions such as change in temperature, humidity, etc.
B Imperfection in 2 Person's carelessness experimental technique
C Personal errors 3 Either positive or negative in one direction.
D Systematic errors 4 Imperfect design or calibration of the measuring instruments.

 488  175 Physical World, Units and Measurements Report Error

Solution:

Correct answer is (a)