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1671

Which of the following statements is TRUE of photoelectric effect?

  • A. it cannot occur in liquids
  • B. the energy of the emitted electrons is independent of the work function of the surface
  • C. the energy of the emitted electron depends on the wavelength of the incident light
  • D. the greater the intensity of the incuident light, the greater the incident of the emitted electron
View Answer & Discuss (7) JAMB 1987
1672
Isotopes are nuclei which have
  • A. the same number of nuetrons and electrons
  • B. equal number of electrons and protons
  • C. the same atomic number but different number of neutrons
  • D. the same number of total particles
View Answer & Discuss (1) JAMB 1987
1673

A radioactive sample initially contains N atoms. After three half-lives the number of atoms that have disintegrated is

  • A. \(\frac{N}{8}\)
  • B. \(\frac{3N}{8}\)
  • C. \(\frac{5N}{8}\)
  • D. \(\frac{7N}{8}\)
View Answer & Discuss (13) JAMB 1987
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1674
Which of the following represents the correct precision if the length of a piece of wire is measured with a meter rule?
  • A. 35mm
  • B. 35.0mm
  • C. 35.00mm
  • D. 35.01mm
View Answer & Discuss (20) JAMB 1986
1675
A heavy object is suspended from a string and lowered into water so that it is completely submerged. The object appears lighter because
  • A. the density of water is less than that of the object
  • B. the pressure is low just below the water surface
  • C. it experiences an upthrust
  • D. the tension in the string neutralizes part of the weight
View Answer & Discuss (4) JAMB 1986
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts