Question

Output of a bimetallic element will be

• A. Strain
• B. Pressure
• C. Displacement
• D. Voltage

Hint:

Bimetallic Strip Operation. Works on differential thermal expansion causing bending. The output is the resulting physical displacement, used for temperature sensing or switching.

Answer 1

The Correct Option is C

A bimetallic element, typically a strip made of two metals with different coefficients of thermal expansion bonded together, responds to temperature changes
As the temperature changes, the two metals expand or contract by different amounts
This differential expansion/contraction forces the strip to bend or curl
The primary, directly measurable output resulting from this bending is a physical displacement of the strip, particularly its free end
This displacement is often used to actuate switches (thermostats), move pointers on dials (thermometers), or trigger other mechanisms
While strain and stress occur within the material during bending, and pressure could potentially be exerted by the moving end, the fundamental output used in measurement or control is the displacement
Voltage is not inherently produced