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Physics WAEC Past Questions

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1291

Which of the following radiations has it's frequency lower than that of infrared radiation?

  • A. Utra-violet rays
  • B. gamma rays
  • C. x-rays
  • D. radio waves
View Answer & Discuss (4) WAEC 2013
1292

A string under tension produces a note of frequency 14Hz. Determine the frequency when the tension is quadrupled.

  • A. 14Hz
  • B. 18Hz
  • C. 28Hz
  • D. 56Hz
View Answer & Discuss (8) WAEC 2013
1293
Which of the following statements about waves in pipes is correct?
  • A. for open pipes, there is only one end correction to be accounted for
  • B. for closed pipes, there are two end corrections to be accounted for
  • C. only odd harmonics are possible in closed pipes
  • D. all harmonics are possible in closed pipes
View Answer & Discuss (1) WAEC 2013
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1294
When a person holds a negatively charges metal rod and stands bare-footed on the ground, how will the charges leak?
  • A. negative charges flows to the ground through the person's body
  • B. positive charges flow from the ground through his body to neutralize the negative charges
  • C. positive charges in the air neutralizes the negative charges the person is holding
  • D. negative charges will leak through the air
View Answer & Discuss WAEC 2013
1295

A charge of 2.0 x 10\(^{-5}\) C experiences a force of 80N in a uniform electric field. Calculate the magnitude of the electric field intensity

  • A. 8.0 x 106 NC-1
  • B. 4.0 x 106 NC-1
  • C. 4.0 x 104 NC-1
  • D. 2.0 x 104 NC-1
View Answer & Discuss (2) WAEC 2013
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