Physics 2019 Past Questions | JAMB

Study the following Physics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

41. When water is boiling, it

  • A. gets hotter
  • B. increase is mass
  • C. decreases in mass
  • D. changes to steam

42. A mixture of blue and red pigment when illuminated by white light will appear

  • A. green
  • B. orange
  • C. purple
  • D. magenta

43. A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. Calculate the frequency and wavelength in air of the note produced (take v = 350m/s)

  • A. 0.875m
  • B. 0.625m
  • C. 0.335m
  • D. 0.125m

44. A man on a bench will exert the greatest pressure on the bench when he

  • A. lies flat on his back
  • B. lies flat on his belly
  • C. stands on both feet
  • D. stands on the toes of one foot

45. Gases conduct electricity under

  • A. high pressure & high voltage
  • B. low pressure & low voltage
  • C. normal pressure & low voltage
  • D. low pressure & high voltage

46. Neutrons were discovered by

  • A. Faraday
  • B. Dalton
  • C. James Chadwick
  • D. Rutherford

47. The mass of a nucleus is the

  • A. total number of its proton & neutrons
  • B. number of its protons
  • C. mass of its electrons
  • D. total number of its protons & electrons

48.  Three resistors with resistance 200Ω, 500Ω and 1kΩ are connected in series. A 6v battery is connected to either end of the combination. Calculate the potential difference between the ends of 200Ω resistance.

  • A. 0.71V
  • B. 0.7V
  • C. 0.82V
  • D. 0.8V

49. An a.c of 1A at a frequency of 800 cycles per second flows through a coil, the inductance of which is 2.5mH and the resistance of which is 5Ω. What is the power absorbed in the Coil?

  • A. 5W
  • B. 6W
  • C. 7W
  • D. 8W

50.  In semi-conductor, the carriers of current at room temperature are

  • A. electrons only
  • B. electrons and holes
  • C. holes only
  • D. electron and ions
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