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Physics WAEC Past Questions

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456

Beta particles are

  • A. electrons
  • B. protons
  • C. neutrons
  • D. helium nuclei
  • E. tritium nuclei
View Answer & Discuss (3) WAEC 1994
457

Which of the following substances is not an insulator?

  • A. Aluminium
  • B. Glass
  • C. Plastic
  • D. Clay
  • E. Cork
View Answer & Discuss (2) WAEC 1994
458
When an atom loses or gains a charge, it becomes an
  • A. ion
  • B. an electron
  • C. a neutron
  • D. a proton
  • E. a deuteron
View Answer & Discuss (1) WAEC 1994
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459
In 24 days a radioactive isotope decreases in mass from 64g to 2g. What is the half life of the radioactive material
  • A. 0.75 days
  • B. 2.58 days
  • C. 4 days
  • D. 4.80 days
  • E. 6 days
View Answer & Discuss (3) WAEC 1994
460
The nucleon number and the proton number of a neutral atom of an element are 238 and 92 respectively. What is the number of neutrons in the atom?
  • A. 330
  • B. 238
  • C. 146
  • D. 119
  • E. 73
View Answer & Discuss (1) WAEC 1994
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