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Physics 2013 WAEC Past Questions

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11

From Newton's first law of motion,

  • A. a body can only undergo translational motion
  • B. once a body remains at rest no force acts on it
  • C. the net force acting in uniform linear motion is zero
  • D. a body's inertia is its weight
View Answer & Discuss (6) WAEC 2013
12

A body of mass 11kg is suspended from a ceiling fan by an aluminum wire of length 2m and diameter 2mm. Calculate the elastic energy stored in the wire [Young's modulus of aluminum is 7.0 x \(10^10Nm^{-2}\), g = 10m\(s^{-2}\), \(\pi\) = 3.142]`

  • A. 1.1 x 10-1J
  • B. 5.5 x 10-2J
  • C. 1.1 x 10-4J
  • D. 5.5 x 10-8J
View Answer & Discuss (7) WAEC 2013
13

The velocity ratio of an inclined plane

  • A. increases with increase in the angle of inclination
  • B. increases with decrease in the angle of inclination
  • C. decreases with decrease in the angle of inclination
  • D. is independent of the angle of inclination
View Answer & Discuss (8) WAEC 2013
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14
Which of the following types of thermometer is used for the calibration of other thermometers?
  • A. liqud-in-glass thermometer
  • B. constant volume gas thermometer
  • C. optical pyrometer
  • D. thermocouple
View Answer & Discuss (2) WAEC 2013
15
The magnitude of the expansion or contraction of a substance depends on the i. temperature change ii. nature of the substance iii. size of the substance. Which of the statements above are correct?
  • A. i and ii only
  • B. ii and iii only
  • C. i and iii only
  • D. i, ii and iii
View Answer & Discuss (6) WAEC 2013
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