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Question (11)

QN0035388

The time period of a satellite revolving around earth in a given orbit is 7 hours. If the radius of orbit is increased to three times its previous value, then approximate new time period of the satellite will be

(A)
40 hours
(B)
36 hours
(C)
30 hours
(D)
25 hours

Correct Answer: B

Explanation:

By Kepler's law

hours hours

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Question (12)

QN0035389

Which of the following graphs represents the motion of a planet moving about the sun?

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

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Question (13)

QN0035390

The figure shows elliptical orbit of a planet about the sun . The shaded area SCD is twice the shaded area . If is the time for the planet to move from to and is the time to move from to then

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

According to Kepler's law, the areal velocity of a planet around the sun always remains constant.

SCD : (areal velocity constant)

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Question (14)

QN0035391

If the distance of earth is halved from the sun, then the no. of days in a year will be

(A)
365
(B)
182.5
(C)
730
(D)
129

Correct Answer: D

Explanation:

From Kepler's law of periods,

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Question (15)

QN0035392

If the earth is at one-fourth of its present distance from the sun, the duration of the year will be

(A)
half the present year
(B)
one-eighth the present year
(C)
one-sixth the present year
(D)
one-tenth the present year

Correct Answer: B

Explanation:

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Question (16)

QN0035393

A satellite of mass ' ', moving around the earth in a circular orbit of radius , has angular momentum . The areal velocity of satellite is mass of earth)

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

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Question (11)

The time period of a satellite revolving around earth in a given orbit is 7 hours. If the radius of orbit is increased to three times its previous value, then approximate new time period of the satellite will be

Explanation:

Link:

Question (12)

Which of the following graphs represents the motion of a planet moving about the sun?

Explanation:

Link:

Question (13)

The figure shows elliptical orbit of a planet about the sun . The shaded area SCD is twice the shaded area . If is the time for the planet to move from to and is the time to move from to then

Explanation:

Link:

Question (14)

If the distance of earth is halved from the sun, then the no. of days in a year will be

Explanation:

Link:

Question (15)

If the earth is at one-fourth of its present distance from the sun, the duration of the year will be

Explanation:

Link:

Question (16)

A satellite of mass ' ', moving around the earth in a circular orbit of radius , has angular momentum . The areal velocity of satellite is mass of earth)

Explanation:

Link:

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