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Physics WAEC Past Questions

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1061

A wire 1.0m long and with cross-sectional area 2.0 x 10-7 m2 has a resistance of 0.1\(\Omega\). Calculate the electrical conductivity of the wire

  • A. 2.0 x 107\(\Omega^{-1} m^{-1}\)
  • B. 5.0 x 107\(\Omega^{-1} m^{-1}\)
  • C. 2.0 x 108\(\Omega^{-1} m^{-1}\)
  • D. 5.0 x 108\(\Omega^{-1} m^{-1}\)
View Answer & Discuss (9) WAEC 2008
1062
Three capacitors each of capacitance 1.5\(\mu F\) are connected in series. The total capacitance in the circuit is
  • A. 2.0 \(\mu F\)
  • B. 1.5 \(\mu F\)
  • C. 0.6 \(\mu F\)
  • D. 0.5 \(\mu F\)
View Answer & Discuss (8) WAEC 2008
1063

A voltmeter is a device that

  • A. draws high current
  • B. has a very low resistance
  • C. has a very high resistance
  • D. is able to measure both voltage and current
View Answer & Discuss (5) WAEC 2008
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1064
Which of the following actions will not increase the sensitivity of a moving coil galvanometer?
  • A. using a strong temporary magnet
  • B. increasing the area and number of turns of the coil
  • C. using a week hair spring
  • D. using a light pointer
View Answer & Discuss (2) WAEC 2008
1065
Fleming's right hand rule is also called the
  • A. motor rule
  • B. dynamo rule
  • C. screw rule
  • D. thumb rule
View Answer & Discuss (1) WAEC 2008
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