Properties Of Solids And Liquids Question 5
Question: Assertion : A brass disc is just fitted in a hole in a steel plate. The system must be cooled to loosen the disc from the hole. Reason : The coefficient of linear expansion for brass is greater than the coefficient of linear expansion for steel.
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: A
Solution:
Linear expansion for brass $ (19\times {{10}^{-4}})> $ linear expansion for steel $ (11\times {{10}^{-4}}) $ . On cooling the disk shrinks to a greater extent than the hole and hence it will get loose.
