JAMB Physics questions

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

1. Question 221· Light: reflection· JAMB

   An object is placed 15 cm from a concave mirror of focal length 10 cm. Find the image distance.

   • A30 cm
   • B6 cm
   • C25 cm
   • D5 cm

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2. Question 222· Light: reflection· JAMB

   A ray strikes a plane mirror at an angle of incidence of 35°. Find the angle between the incident and reflected rays.

   • A35°
   • B70°
   • C55°
   • D110°

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3. Question 223· Light: reflection· JAMB

   The image formed by a plane mirror is:

   • Areal and inverted
   • Bvirtual and magnified
   • Creal and diminished
   • Dvirtual and laterally inverted

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4. Question 224· Light: reflection· JAMB

   An object is 15 cm from a convex mirror of focal length 10 cm. The image is

   • Avirtual and magnified
   • Breal and inverted
   • Creal and magnified
   • Dvirtual, erect and diminished

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5. Question 225· Light: reflection· JAMB

   An image is 30 cm from a mirror when the object is 10 cm away. The magnification is

   • A20
   • B1/3
   • C3
   • D40

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6. Question 226· Light: reflection· JAMB

   Driving mirrors are convex because they

   • Aare cheap
   • Bmagnify images
   • Cform real images
   • Dgive a wide field of view

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7. Question 227· Light: reflection· JAMB

   A concave mirror is used as a shaving mirror because, with the face within its focal length, it gives

   • Aa real image
   • Ban inverted, diminished image
   • Can upright, magnified image
   • Dno image

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8. Question 228· Light: reflection· JAMB

   An object stands 20 cm in front of a plane mirror. How far is the image from the object?

   • A20 cm
   • B40 cm
   • C10 cm
   • D60 cm

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9. Question 229· Light: reflection· JAMB

   The word AMBULANCE is printed in reverse on the front of ambulances because a plane mirror

   • Aproduces real images
   • Bproduces magnified images
   • Cproduces lateral inversion
   • Dreverses top and bottom

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10. Question 230· Light: reflection· JAMB

    A spherical mirror has a radius of curvature of 20 cm. Its focal length is

    • A10 cm
    • B20 cm
    • C40 cm
    • D5 cm

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11. Question 231· Light: reflection· JAMB

    Convex mirrors are used as driving mirrors because they

    • Agive a wide field of view
    • Bgive magnified images
    • Cform real images
    • Dare cheap

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12. Question 232· Light: reflection· JAMB

    Two plane mirrors are inclined at 60° to each other. How many images of an object between them are formed?

    • A6
    • B5
    • C4
    • D3

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13. Question 233· Light: reflection· JAMB

    An object is placed 30 cm from a concave mirror of focal length 10 cm. Find the magnification of the image.

    • A0.5
    • B2
    • C3
    • D1.5

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14. Question 234· Light: reflection· JAMB

    

    A ray of light strikes a plane mirror at 30° to the mirror surface, as shown. What is the angle of reflection?

    • A90°
    • B30°
    • C60°
    • D120°

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15. Question 235· Light: refraction· JAMB

    A pool is 20 cm deep. Find its apparent depth when viewed from above. (Refractive index of water = 1.33)

    • Aabout 10 cm
    • Babout 27 cm
    • C20 cm
    • Dabout 15 cm

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16. Question 236· Light: refraction· JAMB

    Optical fibres carry light by

    • Ainterference
    • Bdiffraction
    • Ctotal internal reflection
    • Dpolarisation

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17. Question 237· Light: refraction· JAMB

    A coin lies at the bottom of a tank of water 12 cm deep. Find its apparent depth. (Refractive index of water = 4/3)

    • A9 cm
    • B16 cm
    • C12 cm
    • D8 cm

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18. Question 238· Light: refraction· JAMB

    An object is placed 30 cm from a converging lens of focal length 10 cm. The image distance is:

    • A7.5 cm
    • B15 cm
    • C20 cm
    • D40 cm

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19. Question 239· Light: refraction· JAMB

    A ray in air strikes a glass surface at an angle of incidence of 60° and is refracted at 30°. Find the refractive index of the glass.

    • A√2
    • B2
    • C1/√3
    • D√3

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20. Question 240· Light: refraction· JAMB

    

    A ray passes from air into a glass block as shown. Given that sin 60° = 0.866 and sin 35° = 0.574, find the refractive index of the glass.

    • A1.71
    • B1.51
    • C0.66
    • D1.25

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