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626

A transformer with 5500 turns in its primary is used between a 240V a. c supply and a 120V kettle. Calculate the number of turns in the secondary

  • A. 11000
  • B. 2750
  • C. 460
  • D. 232
  • E. 10
View Answer & Discuss (7) WAEC 1988
627
Local action is normally prevented from taking place in a simple electric cell by
  • A. introducing an oxidising agent into the acid
  • B. not drawing current continuously for long periods
  • C. amalgamating the surface of the zinc plate
  • D. using a porous pot to isolate the zinc plate from the acid
  • E. using dilute sulphuric acid
View Answer & Discuss (1) WAEC 1988
628

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
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629
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
630
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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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts