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Physics 1983 JAMB Past Questions

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16

Which of the following arrangements in the sequence shown can be used to obtain a pure spectrum of white light?

  • A. source, slit, converging lens, prism, converging lens, screen.
  • B. source, slit, diverging lens, prism, diverging lens, screen.
  • C. source, converging lens, prism, diverging lens, screen.
  • D. source, slit, prism, diverging lens, converging lens, screen.
  • E. source, slit, prism, diverging lens, sreen.
View Answer & Discuss (6) JAMB 1983
17
A milliameter with full scale deflection of 10mA has an internal resistance of 5 ohms. It would be converted to an ammeter with a full scale deflection of 1A by connecting a resistance of
  • A. \(\frac{5}{99}\)ohms in series with it
  • B. \(\frac{5}{99}\)ohms in parallel with it
  • C. \(\frac{99}{5}\)ohms in series with it
  • D. \(\frac{99}{5}\)ohms in parallel with it
  • E. 2 ohms in series with it
View Answer & Discuss (4) JAMB 1983
18
The linear expansivity of brass is 2 x 10-5 oC-1. If the volume of a piece of brass is 10cm3 at 0oC, what will be its volume at 100oC?
  • A. 10.02cm3
  • B. 10.04cm3
  • C. 10.06cm3
  • D. 10.20cm3
  • E. 102.00cm3
View Answer & Discuss (9) JAMB 1983
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19

A 24V potential difference is applied across a parallel combination of four 6-ohms resistor, The current in each resistor is

  • A. 1A
  • B. 4A
  • C. 16A
  • D. 18A
  • E. 36A
View Answer & Discuss (22) JAMB 1983
20
The electrochemical equivalent of a metal is 0.126 x 10-6 kgC-1. The mass of the metal that a current of 5A will deposit from a suitable bath in 1 hour is
  • A. 0.0378 x 10 -3kg
  • B. 0.227 x 10 -3kg
  • C. 0.378 x 10 -3kg
  • D. 0.595 x 10 -3kg
  • E. 2.268 x 10 -3kg
View Answer & Discuss (3) JAMB 1983
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