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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF SOLIDS
1
Medium
1 of 1
Understanding
+4 | -1
Given below are two statements: one is labelled as
Assertion A and the other is labelled as Reason R
Assertion A : Steel is used in the construction of
buildings and bridges.
Reason R : Steel is more elastic and its elastic limit
is high.
In the light of above statements, choose the most
appropriate answer from the options given below.
Assertion A and the other is labelled as Reason R
Assertion A : Steel is used in the construction of
buildings and bridges.
Reason R : Steel is more elastic and its elastic limit
is high.
In the light of above statements, choose the most
appropriate answer from the options given below.
View answer and explanation
Correct option: A
Both A and R are correct and R is the correct
explanation of A
explanation of A
Option A (Both A and R are correct and R is the correct explanation of A) is correct because steel's high elasticity and elastic limit make it suitable for building and bridge construction.
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Reason: Modulus of elasticity is a material property. A wire can be broken by applying a load of 200 N. The force required to break another wire of the same length and same material, but double in diameter, is Assertion(A): If radius of cylindrical wire is doubled, then this wire can bear four times stress.
Reason(R): By doubling the radius, area of cross-section will become four times.
Reason: Modulus of elasticity is a material property. A wire can be broken by applying a load of 200 N. The force required to break another wire of the same length and same material, but double in diameter, is Assertion(A): If radius of cylindrical wire is doubled, then this wire can bear four times stress.
Reason(R): By doubling the radius, area of cross-section will become four times.
