Waec 2010 Physics Past Questions And Answers

Note: You Can Select Post UTME Schools Name Below The Exam Year.
1

A vertical string, suspended from a fixed point and having a small mass attached to the free end is set into oscillations. Which of the following statements about the system are correct? i. The potential energy of the mass is a minimum at the middle of the swing ii. Its kinetic energy is a maximum at the middle of the swing iii. The sum of the potential and kinetic energies is constant throughout the swing

  • A. i,ii and iii
  • B. i and ii only
  • C. ii and iii only
  • D. i and iii only
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2

An electric drill rated 400W is used to drill a hole in copper of mass 400g in 20s. Calculate the rise in temperature if all the heat produced is absorbed by the copper. [specific heat capacity of copper = 400Jkg-1K-1]

  • A. 100oC
  • B. 75oC
  • C. 50oC
  • D. 45oC
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3

A moving body of mass 25.0kg undergoes a uniform retardation of 20.0ms-2. Calculate the magnitude of the retardating force

  • A. 1.25N
  • B. 8.00N
  • C. 45.00N
  • D. 500.00N
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4

In a thermos flask, heat loss by radiation is minimizes by the

  • A. silvered surfaces
  • B. vacuum within the doubled walls
  • C. plastic stopper
  • D. cork support
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5

(a) Differentiate between plane polarization and interference as applied to waves.

(b) List two uses of polaroids.

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6

Which of the following sources of energy is/are exhausible? i. Solar ii. Fossil fuels iii. Tidal power

  • A. i, ii and iii
  • B. i and ii only
  • C. i and iii only
  • D. ii and iii only
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7

A stone is projected vertically upward with a speed of 30ms\(^{1}\) from the top of a tower of height 50 m. Neglecting air resistance, determine the maximum height it reached from the ground. [g = 10 ms\(^-2\)]

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8

A thermometer records 680 mmHg at steam point and 440 mmHg at ice point. The temperature it records at 380 mmHg is

  • A. -25oC
  • B. -20oC
  • C. 20oC
  • D. 25oC
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9

Use the diagram below to calculate the current, I.

  • A. 0.60A
  • B. 0.97A
  • C. 1.03A
  • D. 5.00A
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10

Two cars X and Y travelling in opposite directions along the same high way at uniform velocities 110 kmh-1 and 90kmh-1 respectively pass each other at a certain point. The velocity of X relative to Y at the time they pass each other is

  • A. 200 kmh-1
  • B. 100 kmh-1
  • C. 40 kmh-1
  • D. 20 kmh-1
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