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Physics 2004 NECO Past Questions

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36
A current flows in a series circuit containing a resistor, R, an inductor, L and a capacitor, C. Which of the following is true of the power dissipated in the circuit component(s)?
  • A. The power dissipated in L is greater than zero
  • B. The power dissipated in R is zero
  • C. The sum of the power dissipated in L and C is equal to that in R
  • D. The sum of the power dissipated in L and C is greater than in R
  • E. The sum of the power dissipated in L and C is zero
View Answer & Discuss (1) NECO 2004
37
Emission spectra are caused by
  • A. kinetic energy of moving atoms
  • B. potential energy of an electron in an atom
  • C. transition of an electron from a higher energy level to a lower energy level
  • D. transition of an electron from a lower energy level to higher energy level
  • E. transition of excited protons in the nucleus.
View Answer & Discuss (1) NECO 2004
38
Which of the following is used as a depolarizer in a Denial cell?
  • A. Ammonium chloride
  • B. Copper (II) tetra Oxo sulphate (VI) solution
  • C. Manganese (IV) oxide
  • D. Tetraoxo sulphate (VI) acid
  • E. Water
View Answer & Discuss (1) NECO 2004
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39
A radioactive isotope has a half-life of 8 days. What fraction of the atoms will remain after 72 days?
  • A. 9.766 × 10-4
  • B. 1.736 ×10-3
  • C. 1.953 ×10-3
  • D. 3.472 × 10-3
  • E. 3.906 x 10-3
View Answer & Discuss (5) NECO 2004
40
If the distance between the plates of a parallel plate capacitor is decreased, its capacitance
  • A. becomes zero
  • B. decreases
  • C. increases
  • D. is halved
  • E. remains the same
View Answer & Discuss (1) NECO 2004
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