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3576
Two different materials, rubbed against each other acquired opposite charges when separated. This is an example of charging by
  • A. induction
  • B. friction
  • C. conduction
  • D. convection
View Answer & Discuss (4) WAEC 2016
3577
Which of the following factors does not affect the e.m.f of a primary cell? Its
  • A. size
  • B. internal resistance
  • C. operating temperature
  • D. duration of usage
View Answer & Discuss WAEC 2016
3578

Two magnets are used to magnetize a soft iron bar PQ as illustrated in the diagram given. The correct polarity at P and Q respectively

  • A. S and N
  • B. N and N
  • C. S and S
  • D. N and S
View Answer & Discuss (7) WAEC 2016
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3579
In storing magnets, keepers are used to
  • A. reduced self-demagnetization
  • B. cancel the effect of the earth's magnetic field
  • C. protect the magnet from stray electric field
  • D. increase the strangth of the magnets
View Answer & Discuss WAEC 2016
3580
A 10\(\mu\)C charge moves with a velocity of 1.0 x 105 ms-1 at right angle to a uniform magnetic field of flux density 5.0 x 10-4T. Calculate the force on the charge
  • A. 5.0 x 10-5N
  • B. 5.0 x 10-4N
  • C. 5.0 x 105N
  • D. 5.0 x 106N
View Answer & Discuss (2) WAEC 2016
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