31. The number of protons in a copper atom are A. 2 B. 9 C. 11 D. 29 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
32. With increase in temperature, the electrical conductivity would A. Increase in metals as well as in intrinsic semiconductor B. Increase in metals but decrease in intrinsic semiconductor C. Decrease in metals but increase in intrinsic semiconductor D. Decrease in metals as well as in intrinsic semiconductor Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
33. If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
34. The elements which become superconducting at extremely low temperatures are A. Good conductors at room temperature B. Ferromagnetic at room temperature C. Relatively poor conductors at room temperature D. Insulators at room temperature Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
35. The number of protons in a silicon atom are A. 4 B. 8 C. 12 D. 14 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
36. The residual resistivity of a binary alloy at 0 K is A. Sum of residual resistivities of component metals B. Difference of residual resistivities of component metals C. Product of residual resistivities of component metals D. Dependent on the concentration of minor component in the alloy Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
37. Nickel is a non-magnetic material. A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
38. The most important set of specifications of transformer oil include A. dielectric strength and viscosity B. dielectric strength and flash point C. viscosity and flash point D. flash point and viscosity Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
39. If a small amount of Cu is added to Ni conductor, then A. Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni B. Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres C. Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects D. Resistivity of Ni remains the same Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
40. The fact that domains exhibits spontaneous magnetisation is A. First hypothesis is of Curie B. Second hypothesis is of Weiss C. Curie-Weiss law D. Boltzmann’s statistics Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
