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Physics Questions and Answers

61. The splitting of a beam of white light into its different colours is known as
 
  • A. refraction
  • B. reflection
  • C. dispersion
  • D. none of these
 
 
62. Which one of the following electronic devices is used for digital displays in electronic calculators?
 
  • A. LEDs
  • B. zener diodes
  • C. zener diodes
  • D. none of these
 
63. Alternating current is converted into direct current by
 
  • A. dynamo
  • B. transformer
  • C. rectifier
  • D. motor
 
64. A lens used to rectify long sight is
 
  • A. concave lens
  • B. convex lens
  • C. plano concave lens
  • D. plano convex lens