NEET Physics: Elastic behaviour Practice Questions
15 free multiple-choice questions on Elastic behaviour (Properties of Solids and Liquids) for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. Young's modulus (Y) of a material is a measure of its resistance to which type of deformation?
Show answer & explanation
Correct answer: D — Longitudinal strain
Young's modulus is the ratio of longitudinal stress to longitudinal strain, defining the material's stiffness against stretching or compression along a specific axis.
Q2. For a material obeying Hooke's law, the force required to produce a certain amount of elastic deformation is:
Show answer & explanation
Correct answer: D — Directly proportional to the deformation
Hooke's law states that the restoring force exerted by an elastic material is directly proportional to the extension or deformation applied.
Q3. When a material is subjected to a shear stress, the resulting deformation occurs perpendicular to the direction of the applied force. The modulus that relates shear stress to shear strain is known as:
Show answer & explanation
Correct answer: A — Shear Modulus
The Shear Modulus (G) measures the material's resistance to shearing deformation, linking the applied shear stress to the resulting shear strain.
Q4. Which of the following terms is used to describe the maximum stress a material can withstand while remaining in its elastic limit?
Show answer & explanation
Correct answer: D — Elastic limit
The elastic limit is the point beyond which the material will undergo permanent (plastic) deformation. Stress applied up to this limit results in fully recoverable deformation.
Q5. If the force applied to an elastic wire is doubled while keeping the extension constant, the stress applied to the wire will:
Show answer & explanation
Correct answer: A — Be doubled
Stress is defined as Force/Area. If the force is doubled and the area remains the same, the stress applied to the wire will also double.
Q6. If a material has a higher Young's modulus than another, it means the material is:
Show answer & explanation
Correct answer: A — More rigid
Young's modulus measures the material's resistance to elastic deformation. A higher value indicates greater stiffness or rigidity.
Q7. The potential energy stored in an elastic body is proportional to:
Show answer & explanation
Correct answer: A — The product of stress and strain
The elastic potential energy density is proportional to the square of the strain (or stress), related by the modulus of elasticity.
Q8. If a material is stretched, the magnitude of the force required to cause the deformation is proportional to the amount of deformation, provided the material remains within its elastic range. This concept is described by:
Show answer & explanation
Correct answer: C — Hooke's Law
Hooke's Law states that the force applied is directly proportional to the extension or deformation (F = kx), which is the fundamental mathematical expression for elastic behavior.
Q9. The Bulk Modulus (K) of a substance is defined as the ratio of which two properties?
Show answer & explanation
Correct answer: D — Pressure and volume change
Bulk Modulus (K) is defined as the change in pressure divided by the resulting fractional change in volume (ΔP / ΔV).
Q10. The elastic limit of a material is the point beyond which:
Show answer & explanation
Correct answer: A — permanent deformation occurs
The elastic limit is the maximum stress the material can withstand without undergoing permanent (plastic) deformation. If the load exceeds this, permanent deformation begins.
Q11. Which quantity represents the ratio of tensile stress to longitudinal strain in a material subjected to uniaxial stress?
Show answer & explanation
Correct answer: D — Young's Modulus
Young's Modulus (Y) is defined as the ratio of longitudinal stress to longitudinal strain, which quantifies the stiffness of the material under uniaxial stress.
Q12. If the shear stress applied to a body is zero, what can be concluded about the shear strain in that region?
Show answer & explanation
Correct answer: B — Shear strain is zero
Shear strain (γ) is proportional to shear stress (τ). If the applied shear stress is zero, the resulting shear strain must also be zero.
Q13. If the length of a wire is doubled while keeping its cross-sectional area constant, the longitudinal strain experienced by the wire will:
Show answer & explanation
Correct answer: C — Be doubled
If length (L) is doubled and Area (A) is constant, the strain (ε= ΔL / L) will also be doubled. (If L → 2L, ε→ 2ε).
Q14. When a material is stretched or compressed elastically, the relationship between stress and strain is:
Show answer & explanation
Correct answer: D — Stress is directly proportional to strain
According to Hooke's law, stress (σ) is directly proportional to strain (ε). This relationship is linear within the elastic limit.
Q15. Young's modulus of elasticity of a material is the measure of its resistance to:
Show answer & explanation
Correct answer: A — Elastic deformation
Young's modulus (Y) is defined as the ratio of stress to strain in the elastic region (Y = σ/ε), quantifying the stiffness of the material.
Keep going — practice on Padhai Karlo
Padhai Karlo gives you unlimited NEET practice: chapter-wise questions, timed quizzes, and full mock tests with an All-India Rank — free to start.
Get the free Android app →