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181
Pure silicon can be converted to a p-type by adding a controlled amount of
  • A. trivalent atoms
  • B. tetravalent atoms
  • C. pentavalent atoms
  • D. hexavalent atoms
View Answer & Discuss (3) JAMB 2002
182
The energy associated with the photon of a radio transmission at 3 x 105 Hz is
[h = 6.63 x 10-34Js]
  • A. 2.00 x 10-28J
  • B. 1.30 x 10-28J
  • C. 2.00 x 10- 29J
  • D. 1.30 x 10-29J
View Answer & Discuss (7) JAMB 2002
183

The percentage of the original nuclei of the sample of a radioactive substance left after 5 half - lives is

  • A. 8%
  • B. 5%
  • C. 3%
  • D. 1%
View Answer & Discuss (11) JAMB 2002
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184

From the generating station to each substation power is transmitted at a very high voltage so as to reduce

  • A. hysteresis loss
  • B. eddy current loss
  • C. magnetic flux leakage
  • D. heating in the coils
View Answer & Discuss (18) JAMB 2002
185
The particle that is responsible for the nuclear fission in a nuclear reactor is
  • A. neutron
  • B. prton
  • C. electron
  • D. photon
View Answer & Discuss (2) JAMB 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
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