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A lens forms an upright and diminished i...

A lens forms an upright and diminished image of an object when the object is placed at the focal point of the given lens.
Name the lens.

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Convave lens.
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A lens forms an upright and diminished image of an object when the object is placed at the focal point of the given lens. Draw a ray diagram to show the image formation.

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A convex lens is used to obtain a magnified image of an object on a screen . The object is at a distance 10 m from the lens . If the magnification is 19. the focal length of the lens is

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In an experiment for the determination of focal length of the convex mirror a convex lens of focal length 20cm is placed on the optical bench and an object pin is placed at a distance 30cm from the lens. When a convex mirror is introduced in between the lens and the real and inverted image of the object, the final image of object O is formed at O itself. If the distance between the lens and the mirror is 10cm, then the focal length of the mirror is

A lens produces a virtual image between the object and the lens. Name the lens.

Draw a labelled ray diagram for the formation of image by a convex lens of focal length 15 cm when the object is placed at a distance of 25 cm from the lens. Determine the size of the image formed, if size of the object is 4 cm.

A thin converging lens of focal length f = 25 cm forms the image of an object on a screen placed at a distance of 75 cm from the lens. Now the screen in moved closer to the lens by a distance of 25 cm. The distance through which the object has to be shifted so that its image on the screen is sharp again is

ICSE-SAMPLE QUESTION PAPER 5 -SECTION B
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  2. Why do we prefer arrangements of set B for house circuit?

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  3. A lens forms an upright and diminished image of an object when the obj...

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  4. A lens forms an upright and diminished image of an object when the obj...

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  6. Name the principle on which fuse works.

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  7. To Which wire does the fuse is connected?

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  8. A type of electromagnetic wave has wavelength 50 Å. Name the wave.

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  9. A type of electromagnetic wave has wavelength 50 Å. What is the spee...

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  10. A type of electromagnetic wave has wavelength 50 Å. State one use of...

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  11. Find the equivalent resistance between A and B.

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  12. State whether the resistivity of a wire changes with the change in the...

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  14. In a laboratory experiment to measure specific heat capacity of copper...

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  15. In a laboratory experiment to measure specific heat capacity of copper...

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  16. State Ohm's law? How can it be varified experimentally ? Does it hold ...

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  18. A man spend 6-4 KJ energy in displacing a body by 64 m in the directio...

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  19. A man spend 6-4 KJ energy in displacing a body by 64 m in the directio...

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  20. Which of the two wires of similar dimensions, copper or nichrome, woul...

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