Class 10 ICSE Physics Refraction through a lens Boards Questions
Here we provide Class 10 physics important notes,board questions and predicted questions with Answers for chapter Refraction through a lens. These important notes,board questions and predicted questions are based on ICSE board curriculum and correspond to the most recent Class 10 physics syllabus. By practising these Class 10 materials, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 10 Board examinations.
Class 10 ICSE Refraction through a lens Boards Questions
Refraction through a lens Boards Questions
2020
Q1
Where should an object be placed in front of a convex lens in order to get:
(i) an enlarged real image ?
(ii) enlarged virtual image?
solutions
(i) an enlarged real image ?
(ii) enlarged virtual image?
solutions
Q2
A lens of focal length 20 cm forms an inverted image at a distance 60 cm from
the lens.
(i) Identify the lens. (ii) How far is the lens present in front of the object?
(iii) Calculate the magnification of the image.
solutions
(i) Identify the lens. (ii) How far is the lens present in front of the object?
(iii) Calculate the magnification of the image.
solutions
2019
Q3
(i) If the lens is placed in water instead of air, how does its focal length
change?
(ii) Which lens, thick or thin has greater focal length?
solutions
(ii) Which lens, thick or thin has greater focal length?
solutions
Q4
A virtual, diminished image is formed when an object is placed between the
optical centre and the principal focus of a lens.
(i) Name the type of lens which forms the above image.
(ii) Draw a ray diagram to show the formation of the image with the above stated characteristics.
solutions
(i) Name the type of lens which forms the above image.
(ii) Draw a ray diagram to show the formation of the image with the above stated characteristics.
solutions
Q5
An object is placed at a distance 24 cm in front of a convex lens of focal length
8 cm.
(i) What is the nature of the image so formed?
(ii) Calculate the distance of the image from the lens.
(iii) Calculate the magnification of the image.
solutions
(i) What is the nature of the image so formed?
(ii) Calculate the distance of the image from the lens.
(iii) Calculate the magnification of the image.
solutions
2018
Q6
The power of a lens is —5D.
(i) Find its focal length.
(ii) Name the type of lens.
solutions
(i) Find its focal length.
(ii) Name the type of lens.
solutions
Q7
State the position of the object in front of a converging lens if:
(i) It produces a real and same size image of the object.
(ii) It is used as a magnifying lens.
solutions
solutions
Q8
An object AB is placed between O and F; on the principal axis of a converging
lens as shown in the diagram.
Copy the diagram and by using three standard rays starting from point A, obtain an image of the object AB.
solutions
Copy the diagram and by using three standard rays starting from point A, obtain an image of the object AB.
solutions
Q9
An object is placed at a distance of 12 cm from a convex lens of focal length
8 cm. Find:
(i) the position of the image
(ii) nature of the image
solutions
(i) the position of the image
(ii) nature of the image
solutions
2017
Q10
A Lens forms an upright and diminished image of an object when the object
is placed at the focal point of the given lens.
(i) Name the lens.
(ii) Draw a ray diagram to show the image formation.
solutions
(i) Name the lens.
(ii) Draw a ray diagram to show the image formation.
solutions
2016
Q11
A lens produces a virtual image between the object and the lens.
(i) Name the lens.
(ii) Draw a ray diagram to show the formation of this image.
solutions
(i) Name the lens.
(ii) Draw a ray diagram to show the formation of this image.
solutions
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