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Question
A steel tape gives correct measurement at 20∘ C. A piece of wood is being measured with the steel tape at 0∘ C. The reading is 25 cm on the tape. The real length of the given piece of wood must be
A steel tape gives correct measurement at 20∘ C. A piece of wood is being measured with the steel tape at 0∘ C. The reading is 25 cm on the tape. The real length of the given piece of wood must be
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Solution
The correct option is B Less than 25cm
On heating the distance between the divisions increase and hence it measures less than actual value. But when temperature decreases, distance between divisions decreases and it measures more than actual value.
On heating the distance between the divisions increase and hence it measures less than actual value. But when temperature decreases, distance between divisions decreases and it measures more than actual value.
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