Question on: JAMB Physics - 2015
In which of the following device in the expansion of solid is a disadvantages?
I. Simple pendulum
II. Fire alarms
III. Thermostat
IV. Bimetallic thermometer
A
III only
B
II & III only
C
I only
D
II, III & IV only
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Correct Option: C
The expansion of solids is a disadvantage in a simple pendulum because as the temperature increases, the length of the pendulum increases. This changes the period of oscillation, affecting the accuracy of the pendulum as a timekeeping device. In fire alarms, thermostats, and bimetallic thermometers, the expansion of solids is a desirable feature used to detect or control temperature changes.
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