Chapter 19, Problem 1OQ

To determine

The measurement of length at different temperature.

Answer to Problem 1OQ

Option (b) too short.

Explanation of Solution

The length is changing with temperature. Here, the measurement of length during $22\text{°C}$ will be different than that at $27\text{°C}$.

Since, the object has smaller linear expansion coefficient than steel, the length measured with the heated steel tape will be too short.

Conclusion:

Since, the object has smaller linear expansion coefficient than steel, the length measured with the heated steel tape will be too short. Thus, option (b) is correct.

Since, the measured length with the heated steel tape will be too short. Thus, option (a) is incorrect.

At different temperature the measured length is different Thus, option (c) is incorrect.