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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF SOLIDS
1
Easy
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): The property of body, by virtue of
which it tends to regain its original shape when the
external force is removed, is Elasticity.
Reason (R): The restoring force depends upon the
bonded inter atomic and inter molecular force of
solid.
In the light of the above statements, choose the
correct answer from the options given below:
Assertion (A) and the other is labelled as Reason
(R).
Assertion (A): The property of body, by virtue of
which it tends to regain its original shape when the
external force is removed, is Elasticity.
Reason (R): The restoring force depends upon the
bonded inter atomic and inter molecular force of
solid.
In the light of the above statements, choose the
correct answer from the options given below:
View answer and explanation
Correct option: A
Both (A) and (R) are true and (R) is the correct
explanation of (A)
explanation of (A)
Option A is correct because elasticity is the property of a body to regain its original shape, and this is due to interatomic forces.
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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.
