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541

Two inductors of inductance 4 II and 8 II are arrange in series and a current of 10 A is passed through them. What is the energy stored in them?

  • A. 600 J
  • B. 50 J
  • C. 133 J
  • D. 250 J
View Answer & Discuss (5) JAMB 2011
542
Which of the following materials has an increase in resistance with temperature?
  • A. water
  • B. metals
  • C. wood
  • D. electrolyte
View Answer & Discuss (5) JAMB 2011
543
The bond between silicon and germanium is
  • A. covalent
  • B. ionic
  • C. dative
  • D. electrovalent
View Answer & Discuss (8) JAMB 2011
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544

A radioactive isotope has a decay constant of 10-5s4. Calculate half life

  • A. 6.93 x 10-5s
  • B. 6.93 x 105s
  • C. 6.93 x104s
  • D. 6.93 x 10-4s
View Answer & Discuss (12) JAMB 2011
545
The electrical properties of germanium can be altered drastically by the addition of impurity. This process is referred to as
  • A. saturation
  • B. bonding
  • C. amplification
  • D. dopping
View Answer & Discuss (2) JAMB 2011
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