Physics 2020 JAMB Past Questions

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1

A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undistributed. Eventually all the water tested salty. This action is due to?

  • A. convection
  • B. osmosis
  • C. capillarity
  • D. diffusion
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2

The force required to make an object of mass m, travelling with velocity v, turn in a circle of radius r is

  • A. \(\frac{mv^2}{r}\)
  • B. \(\frac{mr^2}{x}\)
  • C. \(\frac{mr}{v}\)
  • D. \(\frac{mv}{r^2}\)
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3

A machine gun with a mass of 5kg fires a 50g bullet at a speed of 100 ms\(^{-1}\). The recoil speed of the machine gun is 

  • A. 0.5 ms\(^{-1}\)
  • B. 1.5 ms\(^{-1}\)
  • C. 1 ms\(^{-1}\)
  • D. 2ms\(^-1\)
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4

If in a simple pendulum experiment the length of the inextensible string is increased by a factor of four, its period is increased by a factor of?

  • A. 4
  • B. \(\frac{\pi}{2}\)
  • C. \(\frac{1}{4}\)
  • D. 2
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5

In what range of temperature is the expansion of water anomalous?

  • A. +208\(^o\)C to +212\(^o\)C
  • B. -80\(^o\)C + -76\(^o\)C
  • C. 0\(^o\)C to +4\(^o\)C
  • D. -4\(^o\)C to +0\(^o\)C
View Answer & Discuss (2) JAMB 2020