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Physics 2004 WAEC Past Questions

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41
Calculate the energy stored in a 20\(\mu F\) capacitor. If the p.d between the plates is 40V
  • A. 3.2 x 10-2J
  • B. 1.6 x 10-2J
  • C. 8.0 x 10-4J
  • D. 4.0 x 10-4J
View Answer & Discuss (3) WAEC 2004
42
Given that the gravitational constant is G. Newton's universal law of gravitation states that the force of attraction between two masses M1 and M2 separation by a distance r is
  • A. \(Gr^2 M_1M_2\)
  • B. \(Gr M_1M_2\)
  • C. \(\frac{GM_1 M_2}{r^2}\)
  • D. \(\frac{GM_1 M_2}{r}\)
View Answer & Discuss (2) WAEC 2004
43
A charge of 1.6 x 10-10C is placed in a uniform electric field of intensity 2.0 x 105 NC-1. calculate the magnitude of the electric force exerted on the change
  • A. 3.2 x 105N
  • B. 1.8 x 105N
  • C. 3.2 x 10-5N
  • D. 1.8 x 10-5N
View Answer & Discuss WAEC 2004
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44
Which of the following statements is not correct?
  • A. a magnetic field is a region in which a magnetic force will be detected
  • B. a magnetic line of force is a path along which a magnetic fields are scalar quantities it were free
  • C. magnetic fields are scalar quantities
  • D. neutral point are obtained where the earth's magnetic force is exactly equal and opposite to that due to a magnet
View Answer & Discuss WAEC 2004
45
The main function of the mouth piece of a telephone is that it converts sound energy to
  • A. mechanical energy
  • B. electrical energy
  • C. chemical energy
  • D. thermal energy
View Answer & Discuss WAEC 2004
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