MOST IMPORTANT MCQs ON KEPLER'S LAWS OF PLANETARY MOTION

MOST IMPORTANT MCQs ON KEPLER'S LAWS OF PLANETARY MOTION

Quiz

 

1. The orbits of planets around the sun are-
   1.   (a) circular
   2.   (b) parabolic
   3.   (c) elliptical
   4.   (d) straight
2. Which of the following statements are true?
   (i) the orbit of a planet is elliptical with the sun at one of its foci
   (ii) the line joining the planet and the sun sweeps equal areas in equal intervals of time
   (iii) the square of the mean distance of a planet from the sun is proportional to the cube of its orbital period
   1.   (a) only (i) and (ii)
   2.   (b) only (ii) and (iii)
   3.   (c) only (i) and (iii)
   4.   (d) all are correct
3. According to Kepler’s law the relationship between T (time period of revolution of a planet) and r (the semi-major axis of the ellipse) is-
   
   1.   (a) T2 ∝ r
   2.   (b) T2 ∝ r2
   3.   (c) T2 ∝ r-3
   4.   (d) T ∝ r3/2
4. Which of the following graphs represent the motion of a planet about the sun?
   
   1.   (a)
   2.   (b)
   3.   (c)
   4.   (d)
5. The time period of a satellite is 5 hours. If the separation between the earth and the satellite is increased to 4 times, what will be the new time period?
   1.   (a) 20 hours
   2.   (b) 10 hours
   3.   (c) 80 hours
   4.   (d) 40 hours
6. The time period of revolution of planet A around the sun is 8 times that of B. How many times the distance of A from the sun is greater than that of B from the sun?
   1.   (a) 2
   2.   (b) 3
   3.   (c) 4
   4.   (d) 5
7. A planet moving around sun sweeps out area A1 in two days, A2 in three days and A3 in six days. Then the relation between A1, A2, and A3 is-
   1.   (a) 3A1 = 2A2 = A3
   2.   (b) 2A1 = 3A2 = 6A3
   3.   (c) 3A1 = 2A2 = 6A3
   4.   (d) 6A1 = 3A2 = 2A3