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

Correct Answer:

Option C – I only

Explanation

Simple pendulum does not depend on thermal expansion

Five alarms, Thermostat and Bimetallic thermometer are the application of thermal expansion of solid