Physics Elasticity Question 133
Question: To keep constant time, watches are fitted with balance wheel made of
[EAMCET 1994]
Options:
A) Invar
B) Stainless steel
C) Tungsten
D) Platinum
Show Answer
Answer:
Correct Answer: A
Solution:
Because dimension of invar does not varies with temperature.
 BETA
  BETA 
             
             
           
           
           
          