Electric Fire alarm works on the principal of:
الیکٹرک فائر الارم کس پرنسپل پر کام کرتا ہے
- Conduction
- Heat transfer
- contraction
- expansion
Explanation
Expansion of metals or gas, caused by a rise in temperature, exerts pressure that can be used to close the contacts of an electrical circuit.
Comments
Leave a Reply
Your email address will not be published. Required fields are marked *