Is it true that an automatic fire alarm is an example where expansion on heating is put to good use?

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

True

False

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The above statement is True.
The automatic fire alarm is an example where expansion on heating is put to good use.
An automatic fire alarm is a good example of expansion on heating. The fire alarm works on the rule that different solids expand differently when heated. An automatic fire alarm consists of a bimetallic strip with two metal strips, iron, and brass, enclosed together. Brass expands more than iron on heating. Therefore, the fire's heat causes the brass to bend towards the iron strip. The bending of the strip completes the electric circuit of the bell, and it starts ringing like a fire alarm. On cooling the strip, it returns to its original shape and breaks the circuit.

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th

Get Expert Academic Guidance – Connect with a Counselor Today!

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th