In which of the following device is the expansion of solid not required?
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
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 below.