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Physics 2018 JAMB Past Questions

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61

A 40W instrument has a resistance 90 Ohms. On what voltage should it be operated normally

  • A. 60V
  • B. 150V
  • C. 225V
  • D. 360V
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62

Mercury which is spilled onto a glass surface forms ball-like shapes because____.

  • A. Mercury is a metal
  • B. The cohesive force between its molecules is greater than the adhesive force between mercury and glass molecules
  • C. The cohesive force between its molecules is less than the adhesive force between mercury and glass molecules
  • D. The viscosity of mercury is height
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63

Water of mass 150g at 60\(^o\)c is added to 300g of water at 20\(^o\)c and the mixture is well stirred. Calculate the temperature of the mixture.(neglect heat losses to the surroundings)

  • A. 33\(^o\)c
  • B. 40\(^o\)c
  • C. 25\(^o\)c
  • D. 10\(^o\)c
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64

Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules.

  • A. Transitional Motion
  • B. Rotational Motion
  • C. Brownian Motion
  • D. Oscillatory Motion
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65

The process by which protons are converted into helium atoms with a tremendous release of energy is called?

  • A. thermionic emission
  • B. nuclear fission
  • C. thermonuclear fusion
  • D. photoelectric emission
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