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2291
A freely-suspended magnet swinging in a horizontal plane comes to rest with its axis pointing approximately
  • A. north-south
  • B. south-west
  • C. north-east
  • D. south-east
View Answer & Discuss WAEC 2002
2292

Calculate the inductance L, of the coil in the circuit diagram shown above

  • A. 3.8H
  • B. 0.6H
  • C. 0.4H
  • D. 0.2H
View Answer & Discuss (6) WAEC 2002
2293

In a model of the hydrogen atom, the energy levels Wn are given by the formula Wn = -\(\frac{R}{n^2}\), where n is an integer and R is a constant. Determine the energy released in the transition from n = 3 to n = 2.

  • A. \(\frac{R}{5}\)
  • B. -\(\frac{R}{4}\)
  • C. \(\frac{5R}{36}\)
  • D. \(\frac{-5R}{36}\)
View Answer & Discuss (13) WAEC 2002
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2294
If a radioactive atom emits a beta particle, Its mass number
  • A. increases by one
  • B. remains the same
  • C. decreases by one
  • D. increases by two
View Answer & Discuss (5) WAEC 2002
2295
Which of the following is usually used to cause fission in an atomic reactor?
  • A. Alpha particles
  • B. beta particles
  • C. electrons
  • D. Neutrons
View Answer & Discuss (1) WAEC 2002
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