JAMB and WAEC Physics questions

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

1. Question 121· 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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2. Question 122· Dispersion of light and colours· JAMB

   A red cloth viewed in pure green light appears

   • Ablack
   • Bred
   • Cgreen
   • Dwhite

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3. Question 123· 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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4. Question 124· 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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5. Question 125· Elasticity· WAEC

   The law stating that extension is proportional to the applied force, within the elastic limit, is

   • ABoyle's law
   • BNewton's first law
   • CHooke's law
   • DCharles' law

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6. Question 126· Elasticity· WAEC

   A spring extends 3 cm under a 6 N load. Its spring constant is

   • A2 N/m
   • B200 N/m
   • C18 N/m
   • D0.5 N/m

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7. Question 127· 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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8. Question 128· 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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9. Question 129· Elasticity· WAEC

   A spring of force constant 400 N/m is stretched 0.1 m. How much energy is stored in it?

   • A20 J
   • B4 J
   • C2 J
   • D40 J

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10. Question 130· 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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11. Question 131· 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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12. Question 132· 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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13. Question 133· 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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14. Question 134· 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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15. Question 135· Elasticity· WAEC

    A spring extends by 4 mm under a force of 20 N. What force produces an extension of 10 mm, within the elastic limit?

    • A25 N
    • B8 N
    • C80 N
    • D50 N

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16. Question 136· 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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17. Question 137· Elasticity· WAEC

    The point beyond which a stretched wire no longer returns to its original length when the load is removed is the

    • Abreaking point
    • Belastic limit
    • Czero point
    • Dneutral point

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18. Question 138· 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 139· Elasticity· WAEC

    The energy stored in a spring of constant 400 N/m stretched by 0.05 m is

    • A1 J
    • B0.5 J
    • C20 J
    • D10 J

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20. Question 140· 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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