CH-17 Physics of Solids Leave a Comment / By abdulslambsn@gmail.com / October 6, 2025 Welcome To Your Quiz "CH-17 Physics of Solids" Click on "Start Quiz" To Continue... 1. Amorphous solid are also called: Crystalline solid Glassy solid Soft solid Hard solid None 2. Each atom in a crystalline vibrates about a fixed point with an amplitude that: Increases with rise in temperature Decreases with rise in temperature Remains the same with the rise in temperature None of these None 3. An ordinary glass gradually soften into a paste like state before it becomes a very viscous liquid which is possible at: 900⁰ C 600⁰ C 800⁰ C 100⁰ C None 4. The temperature at which the vibration becomes so great that the structure of the crystal breaks is called: Melting point Critical temperature Boiling point None of these None 5. Examples of polymeric solids are: Plastic Ziconia NaCl Copper None 6. Ordinary glass becomes a very viscous liquid at: 600⁰C 800⁰C 300⁰C 100⁰C None 7. The ratio of applied stress to tensile strain is called: Bulk modulus Young Modulus Shear modulus None of the above None 8. When a body is subjected to some external force, deformation is produced in: Shape Length Volume Any of these None 9. A stress which decreases the length along one dimension is known as: Compressive stress Tensile stress Linear stress None of these None 10. When the specimen does not recover its original shape after the stress is removed, its behavior is called: Ductility Deformation Plasticity Elasticity None 11. A steel wire 20 mm in diameter is stretched by a force of 113 N. The tensile stress applied is: 1 MPa 10⁻⁶ N/m² 0.1 MPa 0.2 x 10⁶ Pa None 12. The force applied on a unit area to produce any change in shape, volume and length is called: Stress Strain Elasticity Plasticity None 13. The SI unit of stress is: N-S N-m⁻² N-m N None 14. The extension produced in a sample of material depends upon: Area Force Nature of material All of the above None 15. Materials have specific use depending upon their characteristics and properties such as: Hardness Conducting or magnetic Ductility All of the above None 16. Measure of deformation of body with application of stress is called: Rigidity Modulus of elasticity Elasticity Strain None 17. Any change produced in shape, volume or length when a body is subjected some external force is called: Yield point Elastic limit Deformation Plasticity None 18. A conduction band is always: Partially filled Complete filled Partially Empty Empty None 19. The theory failed to explain the complete electric behaviour of solid: Rutherford's theory Newton's theory Bohr's theory None of the above None 20. Valence band may be: Completely filled Partially filled Both A and B None of these None 21. Partially filled conduction and valence bands with a very narrow forbidden energy gap in between them shows the: Conductors Insulators Semi-conductors None of these None 22. On introducing a small amount of impurity into a pure semi-conductor, its electrical behaviour: Does not change Is changed Is changed very small Is change very large None 23. An example of acceptor impurity is: Phosphorus Indium Arsenic Silicon None 24. The doped semi-conducting materials are called: Superconductors Poor semiconductors Pure semiconductors Extrinsic semiconductors None 25. The material whose resistivity becomes zero below a certain temperature: Conductors Semiconductors Superconductors Insulators None 26. An example of intrinsic semi conductor is: Al Ge Cb Ph None 27. The first superconductor was discovered in: 1923 1917 1905 1911 None 28. Lead becomes superconductor at temperature: 12.66 K 7.2 K 3.0 K 2.5 K None 29. A metallic conductor is conduct electricity because they have large number of free: Ions Electrons Protons Dipoles None 30. In semiconductor, the holes and electrons move in: Opposite direction Same direction Perpendicular to each other None of these None 31. Recently a complex crystalline structure known as yttrium barium copper oxide [Yba₂ Cu₃ O₃] have reported to become super conductor at: 163 K 169 K 200 K 100 K None 32. An electromagnet is the combination of solenoid and a specimen of: Steal inside it Iron inside it Iron outside it Wood inside it None 33. Substances whose atoms do not form magnetic dipole are: Ferromagnetic Paramagnetic Diamagnetic All of these None 34. Ferromagnetic substance have the small regions are called: Magnets Patches Domains None of these None 35. The curie temp for Iron is about: 800⁰C 740⁰C 750⁰C 650⁰C None 36. Which of the following are example of diamagnetic substances: Antimony Cobalt Copper Both A and C None 37. The area of hysteresis loop is proportional to the work done in: Magnetizing of the substance Reversing the magnetic field Demagnetizing the substance None of these None 38. A pentaralent impurity in Si: A free electron and a free hole A free electron No free particle None 39. Which of the following has the highest elasticity? Rubber Steel Glass All None 40. Which of the following has bulk modulus? Water Gas Honey All None 1 out of 8 Thanks For Taking This Quiz - Please See Your Answers/Results Below After Entering Your Name & Email... Name Email Time's up
