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2331
A lamp is rated 240V 60W, calculate the resistance of its filament
  • A. 240\(\Omega\)
  • B. 360\(\Omega\)
  • C. 960\(\Omega\)
  • D. 1440\(\Omega\)
View Answer & Discuss WAEC 2003
2332
The maximum power dissipated by a 100\(\Omega\) resistor in a circuit is 4W. Calculate the voltage across the resistor
  • A. 10V
  • B. 20V
  • C. 25V
  • D. 400V
View Answer & Discuss WAEC 2003
2333
One difference between a reactance and a resistance in an alternating current circuit is
  • A. resistance is larger than reactance
  • B. energy is not diaaipated in a reactance
  • C. energy is stored in a resistance but not in a reactance
  • D. the current in a reactance is lower than in the resistance
View Answer & Discuss (2) WAEC 2003
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2334

The direction of induced current in a straight wire placed in magnetic field is determined by using?

  • A. Fleming's right hand rule
  • B. Maxwell's screw rule
  • C. Faraday's law
  • D. Lenz's law
View Answer & Discuss (4) WAEC 2003
2335

Which of the following statements about an electromagnet is not correct?

  • A. it is a temporary magnet
  • B. its strength depends on the current
  • C. its stength depends on the number of turns in its coil
  • D. it has permanent poles
View Answer & Discuss (7) WAEC 2003
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