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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
3211
The magnetic effect of a current-carrying coil is NOT utilized in the making of a/an
  • A. carbon microphone
  • B. electric bells
  • C. magnetic relay
  • D. telephone earpiece
  • E. thermostat
View Answer & Discuss (1) NECO 2001
3212

In 24 days a radioactive isotope decreases in mass from 128g to 2g. What is the half-life of the radioactive material?

  • A. 2.54 days
  • B. 4.00 days
  • C. 4.80 days
  • D. 6.00 days
  • E. 8.00 days
View Answer & Discuss (4) NECO 2001
3213
In an operating X-ray tube, a high p.d is applied between the cathode and the anode for the purpose of
  • A. accelerating the electrons to a very high energy
  • B. concentrating electrons on the target
  • C. heating the anode
  • D. heating the cathode
  • E. producing a stream of electrons
View Answer & Discuss NECO 2002
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
3214
The ability of the eye to focus on objects at various distances is known as
  • A. accommodation
  • B. astigmatism
  • C. eye ring
  • D. myopia
  • E. presbyopia
View Answer & Discuss (1) NECO 2002
3215

Which colour is deviated least when white light passes through a triangular prism?

  • A. green
  • B. indigo
  • C. red
  • D. violet
  • E. yellow
View Answer & Discuss (10) NECO 2002
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts