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1

Which of the following statements is true of the properties of a moving coil galvanometer?

  • A. THe coil has a small area
  • B. There are strong hair springs to gives a large control panlel
  • C. There is a strong permanent magnet to give high magnetic flux
  • D. it has a small number of turns of coil
View Answer & Discuss (15) JAMB 2002
2

The d.c generator has essentially the same components as the a.c generator except the presence of?

  • A. slip-ring
  • B. carbon brushes
  • C. split ring
  • D. armature
View Answer & Discuss (12) JAMB 2008
3

A step-down transformer has a power output of 50 W and efficiency of 80%. if the mains supply voltage is 200 v, calculate the primary current of the transformer.

  • A. 0.31 A
  • B. 3.20 A
  • C. 3.40 A
  • D. 5.00 A
View Answer & Discuss JAMB 2008
WAEC offline past questions - with all answers and explanations in one app - Download for free
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
4

Two inductors of inductance 5 mll and 15 mll are connected in series and a current of 5A flows through them. the total energy stored in the inductor is?

  • A. 500.0J
  • B. 250.0J
  • C. 62.5J
  • D. 50.0J
  • E. no correct option
View Answer & Discuss (7) JAMB 2010
5

What is the effect of using split-rings in a simple d.c motor?

  • A. The direction of rotation of the coil is reversed
  • B. The current in the coil flows in the same direction
  • C. The current in the coil becomes alternating
  • D. The direction of the force on the coil is reversed
  • E. The contact with the voltage is cut-off
View Answer & Discuss (8) WAEC 1988
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts