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Physics 2013 JAMB Past Questions

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36

To convert a galvanometer to a voltmeter, a

  • A. high resistance is connected to it in series
  • B. high resistance is connected to it in parallel
  • C. low resistance is connected to it in parallel
  • D. low resistance is connected to it in series
View Answer & Discuss (7) JAMB 2013
37

Induced emfs are best explained using

  • A. Ohm's law
  • B. Faraday's law
  • C. Colomb's law
  • D. Lenz's law
View Answer & Discuss (7) JAMB 2013
38
If a current of 2.5A flows through an electrolyte for 3 hours and 1.8g of a substance is deposited, what is the mass of the substance that will be deposited if a current of 4A flows through it for 4.8 hours?
  • A. 2.4g
  • B. 3.2g
  • C. 4.6g
  • D. 4.8g
View Answer & Discuss (4) JAMB 2013
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39
Calculate the energy of the third level of an atom if the ground state energy is - 24.8eV
  • A. -9.20eV
  • B. -8.20eV
  • C. -2.75eV
  • D. -1.75eV
View Answer & Discuss (3) JAMB 2013
40

In photo-emission, the number of photo-electrons ejected per second depends on the?

  • A. frequency of the beam
  • B. work function of the metal
  • C. threshold frequency of the metal
  • D. intensity of the beam
View Answer & Discuss (7) JAMB 2013
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