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1

An electric generator has e.m.f. of 240 V and an internal resistance of 1Ω if the current supplied by the generator is 20A when the terminal voltage is 220 V, find the ratio of the power supplied to the power dissipated?

  • A. 11:1
  • B. 1:11
  • C. 12:11
  • D. 11:12
View Answer & Discuss (17) JAMB 2008
2

Power supply is transmitted at a very high voltage and low current in order to?

  • A. make pass through the trasformers
  • B. increase the power supply
  • C. make it travel fast
  • D. prevent overheating of the coil
View Answer & Discuss (1) JAMB 2010
3

A galvanometer with full-scale deflection of 10 mA is to be converted to a voltmeter with full-scale deflection of 5v.  if a series resistance of 498Ω is used for the conversion, the resistance of the galvanometer is ?

  • A. 1Ω
  • B. 2Ω
  • C. 5Ω
  • D. 10Ω
View Answer & Discuss (9) JAMB 2010
WAEC offline past questions - with all answers and explanations in one app - Download for free
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
4

The dimension of electromotive force are?

  • A. ML2T-3I-1
  • B. ML2T-3I-2
  • C. M2LT-2I-1
  • D. M2L2T-1I-1
View Answer & Discuss (3) JAMB 2008
5

Find the effective resistance in the diagram above

  • A. 6 Ω
  • B. 12 Ω
  • C. 18 Ω
  • D. 24 Ω
View Answer & Discuss (1) JAMB 2008
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free