Question

A broken scale is used to measure the length of a stick, and the reading is directly noted down by looking at the scale from a position directly above it. Which of the following is correct?

• A. The measured length is correct.
• B. The measured length is correct because of parallax error.
• C. The measured length is incorrect because of parallax error.
• D. The measured length is incorrect because of zero error.

Answer 1

The correct option is D

The measured length is incorrect because of zero error.

Since a broken scale has been used to measure the length of a stick and the reading is noted down directly (The initial marking from where the broken scale started is not subtracted) zero error occurred.

Parallax error did not occur because the reading was taken looking from the position directly above it.