41. What is called ‘the brain of a computer’: CPU

42. When milk is churned, the cream separates from it
due to : Centrifugal force

43. When the temperature of a metal is raised, its conductance:
decreases

44. Which type of glass is used for making glass reinforced plastic: Fibre Glass

45. Which type of heat treatment helps steel to bend:
Annealing

46. Which type of reaction produces most harmful radiation:
Fission reaction

47. Who discovered Unix operating system: Dennis
Ritchie

48. Who first used the term ‘Nanotechnology’: Nario
Taniguchi

49. Who invented optical fibre: Narinder Kapany

50. Who is known as ‘the father of personal computer’:
Henri Edward Roberts