Waec 2015 Physics Past Questions And Answers

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

Water is unsuitable for use as a thermometric liquid because it

  • A. expands unevenly between 0°C and 40°C
  • B. has narrow temperature range
  • C. has a concave meniscus
  • D. msintsins fixed density
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2

An object is placed 15cm from a diverging lens of focal length 12cm. The image of the object formed by the lens in

  • A. real and 6.67cm from the lens
  • B. virtual and 6.67cm from the lens
  • C. real and 60.00cm from the lens
  • D. virtual and 60.00cm from the lens
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3

The diagram below illustrates a block ans tackle pulley system in which an effort E supports a load of 100.0N. If the efficiency of the machine is 75%, calculate the value of E

  • A. 22.2N
  • B. 38.0N
  • C. 67.0N
  • D. 75.0N
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4

The pressure applied to an enclosed fluid to one end id transmitted equally throughout the fluid and to the container walls. This statement is

  • A. Archimede's principle
  • B. Bernoulli's principle
  • C. Pascal's principle Heisenberg's
  • D. Heisenberg's uncertainty principle
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5

The circuit above consists of an a. c. voltage input, a diode, a resistor and a voltmeter.

(a) Identify the circuit.

(b) Draw the waveform for the output voltage.

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6

A quantity of hot water at 100oC is added to 400g of water at 10oC until the temperature of the mixture is 60oC.

Calculate the mass of the hot water added. [Specific heat capacity of water =4200JKg-1 K-1]

  • A. 200g
  • B. 320g
  • C. 400g
  • D. 500g
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7

A body is projected at an angle of 30° to the horizontal with a velocity of 150 ms\(^{-1.}\). Calculate the time it takes to reach the greatest height [Take g = 10 ms\(^2\) and neglect air resistance]

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8

In an experiment in which a molten substance is allowed to cool, the cooling curve above was obtained. The temperature 60°C is known as the

  • A. vaporization point
  • B. cooling temperature
  • C. boiling point
  • D. melting point
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9

Two strings each inclined at an angle 30o to the horizontal are used to hold a bucket of water weighing 20N. Calculate the tension in each string.

  • A. 20√N
  • B. 20N
  • C. 10√N
  • D. 10N
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10

All electromagnetic waves in a vacuum have the same

  • A. wavelength
  • B. frequency
  • C. speed
  • D. amplitude
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