Telangana Police Constable Prelims 2018 Paper

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Question : 105 of 200

Marks: +1, -0

Pick out the wrong statement in the following:

Steel is more elastic than copper.
The audible limit of sound of human ear is 20 Hertz to 20000 Hertz
When light travels from air into glass its frequency changes.
Cadmium rods are used in Nuclear reactor to control nuclear fission.

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