Quiz for Elasticity

Q1: Which of the following has the highest Young’s modulus?

A. Rubber B. Steel C. Copper D. Aluminum

Q2: Stress is defined as

A. Force × Area B. Force / Area C. Area / Force D. Force / Volume

Q3: Strain is a

A. Vector quantity B. Dimensional quantity C. Dimensionless quantity D. None of these

Q4: The SI unit of stress is

A. Pascal B. N/m C. N D. Joule

Q5: Hooke’s law is valid within

A. Elastic limit B. Plastic limit C. Breaking point D. All of these

Q6: The ratio of lateral strain to longitudinal strain is called

A. Elastic modulus B. Poisson’s ratio C. Stress D. Hooke’s constant

Q7: A wire is said to be elastic if

A. It returns to its original shape after stretching B. It can stretch a lot C. It breaks easily D. It melts easily

Q8: The Young’s modulus of a material depends on

A. Shape B. Length C. Material D. Mass

Q9: Bulk modulus is defined as

A. Stress/Strain B. Volume strain/Pressure C. Pressure/Volume strain D. None

Q10: A wire elongates 1 mm when stretched with a force. The elongation under double the force is

A. 1 mm B. 2 mm C. 0.5 mm D. 4 mm

Q11: A material obeys Hooke’s law if

A. Stress is proportional to strain B. Stress is constant C. Strain is constant D. None

Q12: Poisson’s ratio for most materials lies between

A. 1 to 2 B. 0 to 1 C. 2 to 3 D. –1 to 0

Q13: What is the dimensional formula of Young’s modulus?

A. MLT⁻² B. ML⁻¹T⁻² C. M⁻¹L⁻¹T² D. ML²T⁻²

Q14: A perfectly elastic body

A. Regains its original shape completely B. Partially regains shape C. Does not regain shape D. Breaks

Q15: A body is said to be plastic if

A. It does not return to its original shape B. It melts easily C. It reflects light D. None

Q16: Which is more elastic: steel or rubber?

A. Rubber B. Steel C. Both same D. Cannot say

Q17: The breaking stress of a wire depends on

A. Length B. Area C. Material D. Shape

Q18: A wire is stretched and energy is stored. This energy is called

A. Kinetic energy B. Potential energy C. Elastic potential energy D. None

Q19: If a wire is stretched to double its length, the stress becomes

A. Half B. Double C. Same D. Quadruple

Q20: Units of Poisson’s ratio are

A. Pascal B. No units C. N/m² D. Joule