passwella.
Menu

JAMB Physics 2012 Question 2

Question 2

Measurement and Units

In order to remove the error of parallax when taking measurements with a metre rule, the eye should be focused

  1. A.slantingly towards the left on the markings
  2. B.slantingly towards the right on the markings
  3. C.vertically downwards on the markings
  4. D.vertically upwards on the markings.
Show the answer and explanation

Answer: C (vertically downwards on the markings)

Explanation

Parallax error is avoided by looking straight down, perpendicular to the scale, directly above the mark being read.