Q NO 1. Cavendish experiment is used to find the value of?
G gravitational constant
g gravitational acceleration
K Coulomb’s constant
none
Q NO 2. Which Kepler’s law also proves law of conservation of angular momentum?
Kepler’s law of periods
Kepler’s law of orbits
Kepler’s law of areas
none of these
Q NO 3. All planets move in …………….. orbits?
circular
elliptical
parabolic
hyperbolic
Q NO 4. Gravity at the center of earth will be?
g=9.8 m per sec sq
zero
none of these
Q NO 5. Gravity varies at height from surface of earth and in depth inside the surface of earth?
decreases as inverse square at height and decreases inversely inside the earth surface at depth
increases at height and decreases for depth
decreases at heights and increases in depth
Q NO 6. The displacement, velocity and acceleration in SHM at mean position will be?
max, mini, max
mini, max, mini
mini, max, max
mini, mini, max
Q NO 7. what will be the approximately time period of pendulum at moon whose length is 1m?
2sec
5 sec
1 s
none of these
Q NO 8. If mass of body is doubled what will be effect on time period of pendulum and time period of mass spring system?
remains same for both
increases 1.41 times, remains same
remains same, increases 1.41 times
none of these
Q NO 9.if length becomes doubled and value of g becomes half what will the new value of time period of simple pendulum?
sq rt 2 times
1.41 times
3 times
none 0f these
Q no 10. Planet will to move faster at which point of elliptical path?
At apehelion
x
Will move with same speed
At apehelion
None of these
Q no 11. When we will discuss about Centre of mass of planet and star then which statement is correct?
Planet and star will be on same side of COM
Planet and star will always be on opposite side of COM
May be both
Q no 12. The apparent weight on equator will be than at poles?
Greater than at poles
Less than at poles
Same as at poles
None of these
Q no 13. Schwarzchild Radius and Event Horizon terms are related to (Rs=GM/c^2)?
Elliptical orbits of planets
About Black Hole
About galaxies
None of these
Q NO 14. Gravitational P.E is?
Inversely proportional to r square
Inversely proportional to r
Is always negative
Both b and c
Q no 15. The time period of a pendulum having infinite length is?
Zero
Infinite
84.6 mint
None
Q no 16. For every 1 degree rise in temperature how much speed of sound will increase?
1.61 m per sec
0.061 m per sec
16 m per sec
None
Q no 17. If pressure of gas is doubled what will be the new velocity of sound in air?
It will increase √2 times
Will increase 2 times
Remains same
None of these
Q no 18. Which have more speed of sound in air?
Moist air
Dry air
Both have same
None
Q no 19. Which have more density?
Mosit air
Dry air
Q no 20. Value of gamma=Cp/Cv for poly atomic gas is?
1.4
1.67
1.40
1.29
