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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
1091

The half-life of a radioactive material is 6hrs. What quantity of 1kg of the material would decay in 24 hours?

  • A. \(\frac{15}{16}\)kg
  • B. \(\frac{1}{2}\)kg
  • C. \(\frac{1}{4}\)kg
  • D. \(\frac{1}{8}\)kg
  • E. \(\frac{1}{6}\)kg
View Answer & Discuss (7) WAEC 1997
1092
The odor of a leaking gas is perceived at a distance from the source. This is made possible by the process of
  • A. Sublimation
  • B. Diffusion
  • C. Osmosis
  • D. Evaporation
  • E. Capillarity
View Answer & Discuss WAEC 1997
1093
Lenz’s law of electromagnetic induction is essentially a statement of the
  • A. Inverse square law of gravitation
  • B. Inverse square law of magnetism
  • C. Inverse square law of electrostatics
  • D. Law of conservation of momentum
  • E. Law of conservation of energy
View Answer & Discuss WAEC 1997
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
1094

The relationship between the directions of magnetic field, the current-carrying wire in the field is easily remembered using

  • A. Octet rule
  • B. Right hand grip rule
  • C. Maxwell’s screw rule
  • D. Ampere’s swimming rule
  • E. Fleming’s left hand rule
View Answer & Discuss (5) WAEC 1997
1095
The current in the primary coil of a transformer is 2.5A. If the coil has 50 turns and the secondary250 turns, calculate the current in the secondary coil. Neglect energy losses in the transformer
  • A. 0.2A
  • B. 0.5A
  • C. 2.5A
  • D. 5A
  • E. 12.5A
View Answer & Discuss (4) WAEC 1997
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