JAMB Physics questions

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

1. Question 61· Dispersion of light and colours· JAMB

   A white shirt viewed in red light appears

   • Ared
   • Bwhite
   • Cblack
   • Dgreen

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2. Question 62· Dispersion of light and colours· JAMB

   A white shirt viewed through a red filter appears

   • Ablack
   • Bwhite
   • Cred
   • Dblue

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3. Question 63· Dispersion of light and colours· JAMB

   Mixing blue light and yellow light produces

   • Ared light
   • Bgreen light
   • Cno light (black)
   • Dwhite light

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4. Question 64· Dispersion of light and colours· JAMB

   A blue book looks blue in white light because it

   • Aproduces blue light
   • Babsorbs blue light
   • Creflects blue light and absorbs the other colours
   • Dreflects all colours

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5. Question 65· Dispersion of light and colours· JAMB

   Mixing red light and green light produces

   • Ablue light
   • Bwhite light
   • Cyellow light
   • Dbrown light

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6. Question 66· Dispersion of light and colours· JAMB

   In the visible spectrum, the colour between green and indigo is

   • Ablue
   • Byellow
   • Corange
   • Dviolet

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7. Question 67· Dispersion of light and colours· JAMB

   A red cloth viewed in pure green light appears

   • Ablack
   • Bred
   • Cgreen
   • Dwhite

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8. Question 68· Elasticity· JAMB

   Tensile strain is

   • Aforce per unit area
   • Bextension divided by original length
   • Cforce times extension
   • Dlength divided by extension

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9. Question 69· Elasticity· JAMB

   A force of 100 N acts on a wire of cross-sectional area 2 mm². Find the stress.

   • A200 Pa
   • B50 Pa
   • C5 × 10⁷ Pa
   • D5 × 10⁴ Pa

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10. Question 70· Elasticity· JAMB

    A wire under a stress of 2 × 10⁸ Pa has a strain of 0.001. Find the Young's modulus of the wire.

    • A2 × 10⁸ Pa
    • B2 × 10⁵ Pa
    • C2 × 10¹¹ Pa
    • D5 × 10⁻¹² Pa

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11. Question 71· Elasticity· JAMB

    A spring extends by 4 cm when a load of 2 N is hung on it. The force constant of the spring is:

    • A0.5 N/m
    • B8 N/m
    • C50 N/m
    • D200 N/m

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12. Question 72· Elasticity· JAMB

    A spring of force constant 400 N/m is pulled by a force of 20 N. Find its extension.

    • A0.05 m
    • B20 m
    • C8000 m
    • D0.5 m

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13. Question 73· Elasticity· JAMB

    A spring of force constant 200 N/m is stretched by 0.1 m. Find the energy stored in it.

    • A20 J
    • B2 J
    • C10 J
    • D1 J

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14. Question 74· Elasticity· JAMB

    A spring stretches 2 cm under a load of 4 N. Find its extension under a load of 10 N, within the elastic limit.

    • A5 cm
    • B8 cm
    • C20 cm
    • D2.5 cm

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15. Question 75· Elasticity· JAMB

    When a wire is stretched beyond its elastic limit, it

    • Abecomes a better conductor
    • Breturns to its original length
    • Cbecomes shorter
    • Dundergoes plastic deformation and does not return to its original length

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16. Question 76· Elasticity· JAMB

    Hooke's law holds provided that

    • Athe load is removed
    • Bthe wire is heated
    • Cthe elastic limit is not exceeded
    • Dthe wire is very long

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17. Question 77· Elasticity· JAMB

    

    The graph shows how the extension of a spring varies with the load on it. Find the force constant of the spring.

    • A50 N/m
    • B0.5 N/m
    • C2 N/m
    • D200 N/m

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18. Question 78· Elasticity· JAMB

    The yield point of a material is the point at which it

    • Areturns to its original length
    • Bbreaks
    • Cobeys Hooke's law
    • Dbegins to stretch a lot for little extra force (plastic flow)

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19. Question 79· Elasticity· JAMB

    Hooke's law states that the extension of a spring is proportional to the applied force provided that

    • Athe force is less than 10 N
    • Bthe spring is made of steel
    • Cthe elastic limit is not exceeded
    • Dthe spring is horizontal

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20. Question 80· Elasticity· JAMB

    Two identical springs each stretch 3 cm under a load W. If they are joined end to end (in series) and the same load W is hung on them, the total extension is

    • A1.5 cm
    • B3 cm
    • C6 cm
    • D9 cm

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    Explanation and discussion