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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
2431
An electric lamp is rated 240V, 40W. What is the cost of running the lamp for 72 hours if the electricity authority charges N2.50 per kWh?
  • A. N7.20
  • B. N18.00
  • C. 180.00
  • D. N720.00
View Answer & Discuss WAEC 2005
2432

Which of the following statements explains lost volt in an electric circuit? The

  • A. total p.d from a source to maintain a flow of current through the circuit as well as the source
  • B. p.d to drive current through the circuit component except the source
  • C. p.d across all external components connected to the source of electricity
  • D. p.d across the internal resistance of the cell
View Answer & Discuss (4) WAEC 2005
2433
A constantan wire has a cross sectional area of 4 x 10-8m2 and a resistivity of 1.1 x 10-6\(\Omega\)m. If a resistor of resistance 11\(\Omega\) is to be made from this wire, calculate the length of the wire required
  • A. 0.4m
  • B. 0.8m
  • C. 2.5m
  • D. 5.0m
View Answer & Discuss WAEC 2005
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2434
The mass and weight of a body on earth are 8kg and 80N respectively. Determine the mass and weight of the body respectively on a planet where the pull of gravity is \(\frac{1}{8}\) that on earth
  • A. 8kg, 8N
  • B. 1kg, 10N
  • C. 64kg, 10N
  • D. 8kg, 10N
View Answer & Discuss WAEC 2005
2435
Lenz's law of electromagnetic induction states that
  • A. a force is exerted on a current-carrying conductor in a magnetic field
  • B. electromotive force id induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
  • C. the magnitude of the induced electromotive force in a circuit is proportional to the rate of change of flux linking the circuit
  • D. the induced current in a coil is in such a direction that it sets up a magnetic field which opposes the change producing it
View Answer & Discuss WAEC 2005
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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