ICSE Class 8 Answered
GIVE NOTES IN BIMETALLIC STRIP
Asked by OMERADANISH | 20 Jul, 2019, 08:41: PM
Expert Answer
Bi-metal strips consists of two strips of different metals with different temperature expansion coefficients
Bi-metal strps are usually made with steel (12 x 10-6 K-1) and copper (16.6 x 10-6 K-1) (or brass 18.7 x 10-6 K-1)joined together (often welded) throughout the length
Bonding two metals with dissimilar thermal expansion coefficients can produce useful devices
for detecting and measuring temperature changes.
The examples shown are straight strips, but bimetallic strips are made in coils to increase their sensitivity for use in thermostats.
One of the many uses for bimetallic strips is in electrical breakers where excessive current through the strip heats it
and bends it to trip the switch to interrupt the current.
Answered by Thiyagarajan K | 21 Jul, 2019, 05:12: PM
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