A steel tape gives correct measurement at 20^ | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The steel tape is calibrated to be correct at $20^{\circ}C$. When the temperature decreases to $0^{\circ}C$,the steel tape undergoes thermal contr

Vedclass · Accepted Answer

$< 25 \, cm$

Vedclass · Answer

(B) The steel tape is calibrated to be correct at $20^{\circ}C$. When the temperature decreases to $0^{\circ}C$,the steel tape undergoes thermal contraction. Due to contraction,the markings on the tape shift closer together,meaning the distance between the $0$ and $25 \, cm$ marks becomes physically shorter than $25 \, cm$ at $20^{\circ}C$. Since the tape is shorter,it will require more 'tape length' to cover the same physical object. Therefore,a reading of $25 \, cm$ on a contracted tape corresponds to a physical length that is less than $25 \, cm$. Thus,the real length of the wood is less than $25 \, cm$.

$A$ steel tape gives correct measurement at $20^{\circ}C$. $A$ piece of wood is being measured with the steel tape at $0^{\circ}C$. The reading is $25 \, cm$ on the tape. The real length of the given piece of wood must be:

Similar Questions

If $F_1$ and $F_2$ are the relative strengths of the gravitational and weak nuclear forces respectively,then $\frac{F_2}{F_1}$ is nearly

The density of a material in $CGS$ system of units is $4 \, g \, cm^{-3}$. In a system of units in which the unit of length is $10 \, cm$ and the unit of mass is $100 \, g$,the value of the density of the material will be:

Which of the following is different from the others in terms of units?

In the following list,the only pair which has different dimensions is

If the percentage errors in measuring the length and the diameter of a wire are $0.1 \%$ each,the percentage error in measuring its resistance will be: (in $\%$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module