In which of the following device is the expansion of solid not required?
I. Simple pendulum
II. Fire alarms
III. Thermostat
IV. Bimetallic thermometer
- III only
- II & III only
-
I only
- II, III & IV only
The correct answer is: C
Explanation
Simple pendulum does not depend on thermal expansion
Five alarms, Thermostat and Bimetallic thermometer are application of thermal expansion of solid
There is an explanation video available .