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Mark ‘T’ if the statement is true and ‘F’ if it is false:
$(a)$. We can obtain an enlarged and erect image with a convex mirror. $(T/F)$
$(b)$. A concave lens always forms a virtual image. $(T/F)$
$(c)$. We can obtain a real, enlarged, and inverted image by a concave mirror. $(T/F)$
$(d)$. A real image cannot be obtained on a screen. $(T/F)$
$(e)$. A concave mirror always forms a real image. $(T/F)$
$(a)$. We can obtain an enlarged and erect image by a convex mirror. $(T/F)$
False
Explanation:
A convex mirror has the ability to form an image of an object spread over a large area if the object is placed at a larger distance. A convex mirror always forms a virtual, upright, and diminished image of the objects.
$(b)$. A concave lens always forms a virtual image. $(T/F)$
True
Explanation:
The image formed by a concave lens is always virtual, erect, and smaller in size than the object. It is diverging in nature.
$(c)$. We can obtain a real, enlarged, and inverted image by a concave
mirror. $(T/F)$
True
Explanation:
A real, enlarged, and inverted image of the object can be obtained by a concave mirror if the object is placed between the center of the curvature and the focus of the mirror.
$(d)$. A real image cannot be obtained on a screen. $(T/F)$
False
Explanation:
There are two types of images formed by mirrors and lenses-
1. Real image- An image that can be obtained on a screen is called a real image.
2. Virtual images- An image that can't be obtained on the screen is called a virtual image.
$(e)$. A concave mirror always forms a real image. $(T/F)$
False
Explanation:
A virtual, erect, and magnified image of the object can be obtained by a concave mirror if the object is placed between the principle focus and the pole of the mirror.
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- When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is:(a) real (b) inverted (c) virtual and inverted (d) virtual and erect
- An erect and enlarged image can be formed by$(a)$. only a convex mirror.$(b)$. only a concave mirror.$(c)$. only a plane mirror.$(d)$. both convex and concave mirrors.
- Which type of mirror can form a real image, and which type of lens forms always a virtual image?
- State whether the following statements are True or False.$(a)$. A concave lens can be used to produce an enlarged and erect image.$(b)$. A convex lens always produces a real image.$(c)$. The sides of an object and its image formed by a concave mirror are always interchanged.$(d)$. Art object can be seen only if it emits light.
- Write T against true and F against false in the following statements.$(a)$. Like charges attract each other (T/F)$(b)$. A charged glass rod attract a charged plastic straw (T/F)$(c)$. Lightning conductor cannot protect a building from lightning (T/F)$(d)$. Earthquakes can be predicted in advance (T/F)
- You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from$(a)$. both concave lens and convex lens.$(b)$. both concave mirror and convex mirror.$(c)$. both concave mirror and convex lens.$(d)$. both convex mirror and concave lens.
- Which mirror can produce a virtual, erect, and magnified image of an object?(a) Concave mirror(b) Convex mirror(c) Plane mirror(d) Both concave and convex mirror
- Fill in the blanks:$(a)$. An image that cannot be obtained on a screen is called ____________.$(b)$. Image formed by a convex __________ is always virtual and smaller in size.$(c)$. An image formed by a __________ mirror is always of the same size as that of the object.$(d)$. An image that can be obtained on a screen is called a _________ image.$(e)$. An image formed by a concave ___________ cannot be obtained on a screen.
- Mark ( T ) if the statement is true and ( F ) if it is false:(i) Carbon dioxide is released during photosynthesis. (T/F)(ii) Plants that synthesize their food are called saprotrophs. (T/F)
- Which of the following can form a virtual image which is always smaller than the object?(a) a plane mirror (b) a convex lens(c) a concave lens (d) a concave mirror
- Indicate whether the following statements are True (T) or False (F).(a) Unicellular organisms have one-celled body. (T/F)(b) Muscle cells branched. (T/F)(c) The basic living unit of an organism is an organ. (T/F)(d) Amoeba has irregular shape. (T/F)
- Mark 'T' if the statement is true and 'F' if it is false:(a) Digestion of starch starts in the stomach. (T/F)(b) The tongue helps in mixing food with saliva. (T/F)(c) The gall bladder temporarily stores bile. (T/F)(d) The ruminants bring back swallowed grass into their mouths and chew it for some time. (T/F)
- Which of the following can be used to form a real image?$(a)$. Concave mirror only.$(b)$. Plane mirror only.$(c)$. Convex mirror only.$(d)$. Both concave and convex mirrors.
