Question

Which of these is not a property of a true Beam-balance?

• A. Both arms are of equal length.
• B. Both the pans are of equal mass.
• C. The pointer of an empty Beam-balance stays horizontal.
• D. The pointer of an empty Beam-balance should be vertical.

Answer 1

The correct option is C

The pointer of an empty Beam-balance stays horizontal.

A true Beam-balance will have both its arms of equal length and same material, the pans should have equal mass, and when at rest the pointer of the empty beam should be vertical.