WAEC Physics questions

379 questions with answers and explanations. Tap an option to check yourself.

1. Question 261· Optical instruments· WAEC

   Short sight is corrected using a

   • Aconverging lens
   • Bdiverging lens
   • Cplane mirror
   • Dprism

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   Explanation and discussion

2. Question 262· Optical instruments· WAEC

   An object is placed 20 cm from a converging lens of focal length 10 cm. The image is formed at a distance of

   • A20 cm
   • B10 cm
   • C6.7 cm
   • D30 cm

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3. Question 263· Optical instruments· WAEC

   Short-sightedness is corrected with a

   • Adiverging lens
   • Bconverging lens
   • Cplane mirror
   • Dprism

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   Explanation and discussion

4. Question 264· Optical instruments· WAEC

   A converging lens of focal length 5 cm is used as a magnifying glass with the final image at the near point, 25 cm away. Find the magnification.

   • A4
   • B5
   • C6
   • D25

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5. Question 265· Optical instruments· WAEC

   Prism binoculars use right-angled prisms mainly to

   • Aabsorb stray light
   • Bsplit light into colours
   • Cmagnify the image
   • Dinvert the image by total internal reflection

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6. Question 266· Optical instruments· WAEC

   The image formed on the screen by a slide projector is

   • Areal and diminished
   • Bvirtual and upright
   • Creal, inverted and magnified
   • Dvirtual and magnified

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7. Question 267· Pressure· WAEC

   Petrol can be drawn from a car tank into a can lower down using a tube. This device works mainly because of

   • Amagnetism
   • Bfriction in the tube
   • Ccapillarity only
   • Datmospheric pressure

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8. Question 268· Pressure· WAEC

   Find the pressure due to water at a depth of 5 m. (density of water = 1000 kg/m³, g = 10 m/s²)

   • A5,000 Pa
   • B2,000 Pa
   • C500 Pa
   • D50,000 Pa

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9. Question 269· Pressure· WAEC

   A block of weight 60 N rests on a face of area 0.2 m². The pressure it exerts is

   • A12 Pa
   • B300 Pa
   • C30 Pa
   • D0.003 Pa

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10. Question 270· Pressure· WAEC

    A box of weight 600 N rests on an area of 0.2 m². What pressure does it exert?

    • A0.0003 Pa
    • B120 Pa
    • C600 Pa
    • D3000 Pa

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11. Question 271· Pressure· WAEC

    Which instrument is used to measure atmospheric pressure?

    • Ahydrometer
    • Bmanometer
    • Cbarometer
    • Dhygrometer

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12. Question 272· Pressure· WAEC

    A diver is 8 m below the surface of a lake. What pressure does the water exert on her? [density of water = 1000 kg/m³, g = 10 m/s²]

    • A8000 Pa
    • B80 000 Pa
    • C800 Pa
    • D1250 Pa

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13. Question 273· Pressure· WAEC

    A force of 200 N acts on an area of 0.5 m². The pressure is

    • A400 Pa
    • B100 Pa
    • C200.5 Pa
    • D1,000 Pa

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14. Question 274· Pressure· WAEC

    A force of 1,000 N acts on an area of 0.25 m². Find the pressure.

    • A250 Pa
    • B4,000 Pa
    • C1,000.25 Pa
    • D0.00025 Pa

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15. Question 275· Pressure· WAEC

    A mercury barometer reads 76 cm on a day. A water barometer would read about

    • A10.3 m
    • B76 cm
    • C1.03 m
    • D103 m

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16. Question 276· Pressure· WAEC

    The pressure at a point in a liquid depends on the

    • Avolume of the liquid
    • Bshape of the container
    • Carea of the container
    • Ddepth and the density of the liquid

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17. Question 277· Pressure· WAEC

    The pressure at a depth of 5 m in water (density 1000 kg/m³, g = 10 m/s²), ignoring the atmosphere, is

    • A500 Pa
    • B5,000 Pa
    • C50,000 Pa
    • D500,000 Pa

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18. Question 278· Quantity of heat· WAEC

    The heat capacity of a body is

    • Aits latent heat
    • Bits mass times density
    • Cthe heat needed to raise its temperature by 1 K
    • Dits temperature

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19. Question 279· Quantity of heat· WAEC

    Heat needed to raise 2 kg of water by 10 K (c = 4200 J/kg K) is

    • A8,400 J
    • B42,000 J
    • C84,000 J
    • D840 J

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20. Question 280· Quantity of heat· WAEC

    Coastal towns such as Lagos have smaller daily temperature changes than inland towns because water has a

    • Alow specific heat capacity
    • Bhigh specific heat capacity
    • Chigh density
    • Dlow boiling point

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    Explanation and discussion