". VdoTips: Science Multiple Choice Questions

Science Multiple Choice Questions

46. Solar cell works based on
(A).Laser technology
(C).Thermal emission
(C).Tyndall effect

47. Optical fiber operates on the principle of
(A).Total internal reflectance
(B).Tyndall effect
(C).Photo-electric effect
(D).Laser technology

48. When Pt and Co are electrically connected, which one gets corroded
(D).Can’t decide

49. Which of the following can be used for cathodic protection:

50. If the surface crack causing fracture in a brittle material is made twice as deep, the fracture strength will
(A).decrease by a factor of v2
(B).decrease by a factor of 2
(C).decrease by a factor of 22
(D).No change