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Physics 1988 WAEC Past Questions

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36

A cell can supply current of 0.8A and 0.4A through a 2Ω and a 3Ω resistors respectively. Calculate the internal resistance of the cell.

  • A. 0.2Ω
  • B. 0.4Ω
  • C. 1.0Ω
  • D. 3.0Ω
  • E. 9.0Ω
View Answer & Discuss (14) WAEC 1988
37
A battery of emf 24V and internal resistance 4Ω is connected to a resistor of 32Ω. What is the terminal p.d of the battery?
  • A. 24.0V
  • B. 21.3V
  • C. 16.0V
  • D. 2.7V
  • E. 2.0V
View Answer & Discuss (9) WAEC 1988
38
Two parallel conductors carry equal currents in the same direction. Which of the following statement is not a correct observation?
  • A. Each of teh conductors will experience a force
  • B. Each of the conductors can move
  • C. The forces on the conductors will be equal
  • D. There are concentric lines of force around each conductor
  • E. The two conductors will repel each other
View Answer & Discuss (3) WAEC 1988
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39
It takes 4 minutes to boil a quantity of water electrically. How long will it take to boil same quantity of water using the same heating coil but with the current doubled? (neglecting any external heat loss).
  • A. 64 minutes
  • B. 32 minutes
  • C. 8 minutes
  • D. 2 minutes
  • E. 1 minute
View Answer & Discuss (6) WAEC 1988
40
A lamp is marked 220V 60 W. Calculate the energy it would consume when connected to a 220V source for 1 hour.
  • A. 216000J
  • B. 13200J
  • C. 3600J
  • D. 864J
  • E. 220J
View Answer & Discuss (3) WAEC 1988
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