CBSE Questions for Class 7 Physics Light Quiz 12 - MCQExams.com

CBSE
Class 7 Physics
Light
Quiz 12

Where can we see an image formed the lens of an object?

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On the object itself
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On the lens itself
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On the same side of the object
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On the opposite side of the object

Explanation

The image formed by a lens is on the
side opposite to that of the object, thus option $$D$$ is correct.

Choose whether true or false:-
The lenses which feel thicker in the middle than at the edges are converging lenses.

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True
0%
False

Explanation

Those lenses which feel thicker in the middle than at the edges are convex lenses which are also called converging lens, thus the statement is true.
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1989510_1951153_ans_732dcd659bed4c6ca23a550266b743c5.png

Which of the following are the properties of lenses?

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Opaque
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Transparent
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Allows light to pass through
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Shiny

Explanation

A piece of transparent material (such as glass) that has two opposite regular surfaces either both curved or one curved and the other plane and that is used either singly or combined in an optical instrument for forming an image by focusing rays of light.

Why is convex lens used as a magnifying glass?

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It forms erect image
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It forms real image
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It forms virtual image
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It forms magnified image

Explanation

Magnifying glasses are used to form a bigger image of a smaller object, generally object kept in front of mirror between pole and focus. In this given location of an object, convex lenses forms bigger and erect images. So convex lens is used as a magnifying glass.
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2109257_1951163_ans_6c27a5e4e25448da9dbb1c43fc9dd506.png

A diverging lens forms _______ & ________ image

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Erect
0%
Real
0%
Virtual
0%
Magnified

Explanation

The image formed by a concave lens or a diverging lens is always virtual, erect and diminished thus options $$A&C$$ is correct.
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