ICSE Class 9 Answered
The diagram shows a bimetallic strip as used in a simple fire alarm.
1. Name the suitable materials for A and B.
2. What adjustments would you make to the arrangments shown, to make the alarm operate at lower temperature? Give reasons for your answer.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
1. A is invar and B is brass.
2. The contact points are brought closer to one another. This makes the bimetallic strip to make contact at lower temperature and hence, bell starts ringing.
Answered by | 04 Jun, 2014, 03:23: PM
