Home
Class 10
PHYSICS
To form an image twice the size of the o...

To form an image twice the size of the object, using a convex lens of focal length 20 cm, the object distance must be

A

`lt 20 cm`

B

`gt 20 cm`

C

`lt 20 cm` or between 20 cm and 40 cm

D

equal to 40 cm

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • LIGHT - REFLECTION AND REFRACTION

    ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS SECTION (VERY SHORT ANSWER TYPE QUESTIONS) VSA|34 Videos

  • LIGHT - REFLECTION AND REFRACTION

    ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS SECTION (SHORT ANSWER [SA] TYPE - I QUESTIONS)|28 Videos

  • LIGHT - REFLECTION AND REFRACTION

    ZEN PUBLICATION|Exercise QUESTIONS SECTION (TEXTUAL EXERCISE)|34 Videos

  • ELECTRICITY

    ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS SECTION (MULTIPLE CHOICE QUESTIONS)|60 Videos

  • MAGNETIC EFFECTS OF ELECTRIC CURRENT

    ZEN PUBLICATION|Exercise Additional question section (Higher-order thinking skills [HOTS] questions)|20 Videos

Similar Questions

Explore conceptually related problems

A student has obtained a point image of a distant object using a convex lens. To find the focal length of the convex lens, he should measure the distance between the :

A 4cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 24 cm. the distance of the object from the lens is 16 cm. Find the position, size and nature of the image formed using the lens formula.

An object is kept on the principal axis of a concave mirror of focal length 12 cm. If the object is at a distance of 18 cm from the mirror, calculate the image distance. Determine the nature of the image formed by calculating the magnification produced by the mirror.

ZEN PUBLICATION-LIGHT - REFLECTION AND REFRACTION-ZEN ADDITIONAL QUESTIONS SECTION (MULTIPLE - CHOICE QUESTIONS)
  1. The relation between refractive index of a medium (mu) in terms of vel...

    Text Solution

    |

  2. The bending of a light ray due to change in velocity of light as the m...

    Text Solution

    |

  3. To form an image twice the size of the object, using a convex lens of ...

    Text Solution

    |

  4. The combination of a convex lens and a concave lens each of focal leng...

    Text Solution

    |

  5. A dentist uses a concave mirror to examine the teeth. The position of ...

    Text Solution

    |

  6. In the figure, AB is an object of height 2 cm. The position and height...

    Text Solution

    |

  7. Concave mirrors are used as reflectors in the headlights of vehicles, ...

    Text Solution

    |

  8. Which of these is true about the value of linear magnification (|m|) o...

    Text Solution

    |

  9. The refractive index of a given pair of media is independent on which ...

    Text Solution

    |

  10. A student has obtained a point image of a distant object using a conve...

    Text Solution

    |

  11. In the incomplete ray diagram given below, the object AB would be at t...

    Text Solution

    |

  12. Two lenses of power +3.5 D and - 2.5 D are placed in contact. The lens...

    Text Solution

    |

  13. To obtain a diminished image of an object from a concave mirror, posit...

    Text Solution

    |

  14. Identify the emergent ray in the given figure

    Text Solution

    |

  15. An object is kept at the centre of curvature of a concave mirror. The ...

    Text Solution

    |

  16. Which of the following can make parallel beam of light when light from...

    Text Solution

    |

  17. A full length image of a distant tall building can definitely be seen ...

    Text Solution

    |

  18. In torches, search lights and headlights of vehicles the bulb is place...

    Text Solution

    |

  19. The laws of reflection hold good for

    Text Solution

    |

  20. A child is standing in front of a magic mirror. She finds the image of...

    Text Solution

    |