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Physics 2004 JAMB Past Questions

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1
A generator manufacturing company was contracted to produce an a.c dynamo but inadvertently produced a d.c dynamo. To correct this error, the
  • A. armature coil should be made of silver
  • B. commutator should be replaced with slip ring
  • C. commutator should be replaced with split rings
  • D. armature coil should be made of aluminium
View Answer & Discuss (2) JAMB 2004
2

A radioisotope has a decay constant of 10\(^{-7}\)s\(^{-1}\). The average life of the radioisotope is

  • A. 1.00 x 107s
  • B. 6.93 x 106s
  • C. 1.00 x 10-7s
  • D. 6.93 x 107s
View Answer & Discuss (9) JAMB 2004
3
An a.c circuit of e.m.f 12V has a resistor of resistance 8Ω connected in series to an inductor of inductive reactance 16Ω and a capacitor capacitive reactance 10Ω. The current flow in the circuit is
  • A. 1.4A
  • B. 1.2A
  • C. 12.0A
  • D. 14.0A
View Answer & Discuss JAMB 2004
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4
For semi conductor to have negative temperature coefficient of resistance implies that
  • A. their resistance decrease with temperature
  • B. The resistance increase with temperature
  • C. their resistance is constantly changing with temperature
  • D. they have electrons and holes at high temperature
View Answer & Discuss JAMB 2004
5
X rays can be used in the study of crystal structure because they
  • A. have a very long-reaching wavelength
  • B. have extremely short wavelength
  • C. are invisible
  • D. are very fast
View Answer & Discuss (1) JAMB 2004
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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