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 Simple pendulum
  • B III only
  • C II & III only
  • D I only
  • E II, III & IV only
jamb 2015physics

The correct answer is C. II & III only

Simple pendulum does not depend on thermal expansion

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

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