GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 017
161). Why does radio reception improve slightly during the night?
A). The outside noise is reduced very much at night
B). Unlike the daytime, only a few radio stations broadcast during the night
C). Sunlight affects radio broadcasts to some extent during the day
D). The magnetic field of the earth acts with reduced intensity during the night, thereby reducing its impact on broadcasts
Answer: Sunlight affects radio broadcasts to some extent during the day
162). Television signals cannot be received ordinarily beyond a particular distance due to
A). weakness of the signals
B). weak antenna
C). absorption of signals in the air
D). curvature of the earth
Answer: curvature of the earth
163). Radar is used for
A). receiving signals in a radio receiver
B). studying the movement of planets
C). detecting and fixing the position of obects, e.g., aeroplanes
D). studying the sunspots
Answer: detecting and fixing the position of obects, e.g., aeroplanes
164). Planets are
A). luminous bodies that twinkle
B). non-luminous bodies that twinkle
C). luminous bodies that do not twinkle
D). non-luminous bodies that do not twinkle
Answer: non-luminous bodies that do not twinkle
165). A small hole in the window of a closed room forms an inverted image of outside building on the opposite wall of the room. This happens because
A). the rays of light suffer lateral inversion on entering the hole
B). of the rectilinear propagation of light
C). the hole acts as a convex lens
D). the hole acts as a prism
Answer: of the rectilinear propagation of light
166). A lunar eclipse occurs when
A). the sun, the moon and the earth are not in the same line
B). the moon comes between the sun and the earth
C). the earth comes between the sun and the moon
D). the sun comes between the earth and the moon
Answer: the earth comes between the sun and the moon
167). A solar eclipse occurs when
A). the moon comes between the sun and the earth
B). the earth comes between the sun and the moon
C). the sun comes between the earth and the moon
D). the sun, the moon and the earth are not in the same line
Answer: the moon comes between the sun and the earth
168). Which part of the sun is visible during total solar eclipse?
A). no part
B). corona
C). chromosphere
D). photosphere
Answer: corona
169). The image of an object formed in a plane mirror
A). is real
B). is virtual
C). can be obtained on screen
D). is slightly shorter than the object
Answer: is virtual
170). The minimum length of a plane mirror in which a person can see himself full length should be
A). equal to the person's height
B). slightly more than his height
C). nearly half his height
D). nearly one-fourth his height
Answer: nearly half his height
A). The outside noise is reduced very much at night
B). Unlike the daytime, only a few radio stations broadcast during the night
C). Sunlight affects radio broadcasts to some extent during the day
D). The magnetic field of the earth acts with reduced intensity during the night, thereby reducing its impact on broadcasts
Answer: Sunlight affects radio broadcasts to some extent during the day
162). Television signals cannot be received ordinarily beyond a particular distance due to
A). weakness of the signals
B). weak antenna
C). absorption of signals in the air
D). curvature of the earth
Answer: curvature of the earth
163). Radar is used for
A). receiving signals in a radio receiver
B). studying the movement of planets
C). detecting and fixing the position of obects, e.g., aeroplanes
D). studying the sunspots
Answer: detecting and fixing the position of obects, e.g., aeroplanes
164). Planets are
A). luminous bodies that twinkle
B). non-luminous bodies that twinkle
C). luminous bodies that do not twinkle
D). non-luminous bodies that do not twinkle
Answer: non-luminous bodies that do not twinkle
165). A small hole in the window of a closed room forms an inverted image of outside building on the opposite wall of the room. This happens because
A). the rays of light suffer lateral inversion on entering the hole
B). of the rectilinear propagation of light
C). the hole acts as a convex lens
D). the hole acts as a prism
Answer: of the rectilinear propagation of light
166). A lunar eclipse occurs when
A). the sun, the moon and the earth are not in the same line
B). the moon comes between the sun and the earth
C). the earth comes between the sun and the moon
D). the sun comes between the earth and the moon
Answer: the earth comes between the sun and the moon
167). A solar eclipse occurs when
A). the moon comes between the sun and the earth
B). the earth comes between the sun and the moon
C). the sun comes between the earth and the moon
D). the sun, the moon and the earth are not in the same line
Answer: the moon comes between the sun and the earth
168). Which part of the sun is visible during total solar eclipse?
A). no part
B). corona
C). chromosphere
D). photosphere
Answer: corona
169). The image of an object formed in a plane mirror
A). is real
B). is virtual
C). can be obtained on screen
D). is slightly shorter than the object
Answer: is virtual
170). The minimum length of a plane mirror in which a person can see himself full length should be
A). equal to the person's height
B). slightly more than his height
C). nearly half his height
D). nearly one-fourth his height
Answer: nearly half his height
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