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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF SOLIDS
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Assertion: In spring ball model, displace any ball from its equilibrium position the spring system tries to restore the ball back to its original position.
Reason: The elastic behaviour of solids can be explained in terms of microscopic nature of the solid.
Reason: The elastic behaviour of solids can be explained in terms of microscopic nature of the solid.
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Correct option: A
If both assertion and reason are true and reason is the correct explanation of assertion
Option B (50) is correct because in a half-wave rectifier, the output frequency is the same as the input frequency.
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Assertion: From the relation we can say that, if length of a wire is doubled, its Young's modulus of elasticity will also becomes two 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.
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.