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21
What will be the Indian Standard Time when it is 12 noon in London?
A. 5:30 p.m.
B. 2:30p.m.
C. 12 noon
D. 2:30 a.m.
Answer - A
Solution
Points to Know-
India is at 82½° E so 5.5 hours ahead of GMT, so GMT+5.5
If time is 12 PM in London then time is 5:30 PM in India
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22
What is difference in time between two places located at 30°E and 30°W?
A. 1 hour
B. 2 hours
C. 3 hours
D. 4 hours
Answer - D
Solution
Points to Know-
1° longitude change brings 4 minutes change in time
As the difference between two longitudes is 60°
So, the change in time will be 60 × 4 = 280 minutes, or, 4 hours
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23
What will be the time on 92°E if it is 8:00 a.m. on IST?
A. 7:22 a.m.
B. 8:38 a.m.
C. 7:38 a.m.
D. 8:22 a.m.
Answer - B
Solution
Points to Know-
As India is 82½°E which is 5.5 hours ahead of GMT and the given place is in east of India so time will be added to it
Difference of longitude between two places is 92° – 82½° = 9½°
And 1° longitude change brings 4 minutes change in time
So, change in time between two places will be 9½ × 4 = 38 minutes
Therefore, time will be 8:00 a.m. + 38 minutes = 8:38 a.m.
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24
What is Earth Day?
A. Period of rotation on its axis
B. Period of revolution around sun
C. Time at standard meridian
D. None of the above
Answer - A
Solution
Points to Know-
Rotation is movement of the Earth on its axis and the period of rotation is called earth day
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25
Which of the following is true?
i. Season change are the result of rotation
ii. Axis of earth makes an angle of 66½° with its orbital plane
A. Only i
B. Only ii
C. Both i and ii
D. None of the above
Answer - B
Solution
Points to Know-
Season change is the result of revolution which is the movement of earth around the sun in a fixed path or in an elliptical orbit.
The Earth is 231⁄2° tilted on its axis and axis of earth, an imaginary line, makes an angle of 66 1⁄2° with its orbital plane.
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26
What is true regarding events happened on 21st June?
A. Sun shine directly over Tropic of Capricorn
B. Whole earth experience equal day and night
C. North pole is inclined towards the sun
D. Longest day in south of equator
Answer - C
Solution
Points to Know-
On 21st June
• Sun shines perpendicularly over the tropic of cancer
• North pole is inclined towards the sun
• Place beyond arctic Circle have continuous daylight for 6 months
• Summer in regions north of equator
• Longest day and smallest night here
• Reversed conditions in southern hemisphere
• This position is called Summer Solstice
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27
On which day, sun shines directly over the Tropic of Capricorn?
A. 21st march
B. 21st June
C. 23rd September
D. 22nd December
Answer - D
Solution
Points to Know-
On 22nd December
• Sun shines directly over the tropic of Capricorn
• South pole is inclined towards the sun
• It is summer in the Southern Hemisphere with longer days and shorter nights
• This position is Winter Solstice
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28
North pole is inclined towards the Sun on-
A. 21st march
B. 21st June
C. 23rd September
D. 22nd December
Answer - B
Solution
Points to Know-
On 21st June
• Sun shines perpendicularly over the tropic of cancer
• North pole is inclined towards the sun
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29
What is true regarding equinoxes?
A. Occurs on 23rd June
B. None of the pole is tilted towards the sun
C. Shortest night in Southern hemisphere
D. Sun shines perpendicular over Tropic of Cancer
Answer - B
Solution
Points to Know-
• Equinox takes place on 21st March and 23rd September
• In this sun shines directly overhead the equator
• At this position, neither of the poles is tilted towards the sun. Due to this, Whole earth experience equal days and nights.
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30
Movement of Earth around sun is called-
A. Rotation
B. Revolution
C. Orbit plane
D. Circle of illumination
Answer - B
Solution
Points to Know-
Rotation is movement of the Earth on its axis
Revolution is the movement of earth around the sun in a fixed path or in an elliptical orbit.
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