Download App

Physics M.C.Q (1 Marks)

PART - 1 CH - 7 Gravitation · Gujarat Board (GSEB) STD 11 Science (GSEB - English Medium). 16 questions.

Questions

M.C.Q (1 Marks)

🎯

Test yourself on this topic

16 questions · timed · auto-graded

MCQ 11 Mark
The intensity of the gravitational field at a distance $r$ from the center of a spherical shell of mass M and radius $R (r< R )$ will be :
  • A
    $E _g=\frac{- GM }{r^2}$
  • B
    $E _g=-\frac{ GM }{ R ^2}$
  • C
    $E _g=-\frac{ GM r}{ R ^3}$
  • ✓
    Zero
Answer
Correct option: D.
Zero
D
View full question & answer→
MCQ 21 Mark
What is the formula to find escape velocity?
  • A
    2gR
  • B
    gR
  • C
    $\sqrt{g R }$
  • ✓
    $\sqrt{2 g R}$
Answer
Correct option: D.
$\sqrt{2 g R}$
D
View full question & answer→
MCQ 31 Mark
At whose name did India launch the first statellie?
  • A
    Bhaskaracharya
  • B
    Kalpana Chawla
  • ✓
    Aryabhata
  • D
    Varahamihir
Answer
Correct option: C.
Aryabhata
C
View full question & answer→
MCQ 41 Mark
On which principle does the ball pen work?
  • A
    Gravity
  • B
    Surface tension
  • C
    Viscosity
  • D
    Capillarity
Answer
A Ink in a ball pen comes down due to gravity.
View full question & answer→
MCQ 51 Mark
What is the velocity of a statellite intersecting in a parking orbit ?
  • ✓
    $3.1 km / s$
  • B
    $8 km / s$
  • C
    $11.2 km / s$
  • D
    $12.2 km / s$
Answer
Correct option: A.
$3.1 km / s$
A
View full question & answer→
MCQ 61 Mark
A person can jump higher on the lunar surface than on the earth's surface because:
  • ✓
    The value of g on the Moon is less than on Earth
  • B
    There is no atmosphere on the Moon
  • C
    The moon is cooler than the Earth
  • D
    The surface on the moon is rough.
Answer
Correct option: A.
The value of g on the Moon is less than on Earth
A
View full question & answer→
MCQ 71 Mark
The weight of an object at the center of the Earth will be:
  • ✓
    Zero
  • B
    Infinite
  • C
    Similar to the earth's surface
  • D
    None of the above
Answer
Correct option: A.
Zero
A
View full question & answer→
MCQ 91 Mark
According to Kepler's third law, square of period of rotation of a planet is:
  • A
    directly proportional to r
  • B
    directly proportional to r2
  • ✓
    directly proportional to r3
  • D
    inversely proportional to r
Answer
Correct option: C.
directly proportional to r3
C
View full question & answer→
MCQ 101 Mark
On doubling the distance between two masses, the gravitational force between the masses:
  • A
    Will remain unchanged
  • ✓
    Will be quartered
  • C
    Will remain half
  • D
    Will double
Answer
Correct option: B.
Will be quartered
B
View full question & answer→
MCQ 111 Mark
Where is the value of g is maximum?
  • ✓
    On the surface of earth
  • B
    At some height
  • C
    At depth
  • D
    At the centre
Answer
Correct option: A.
On the surface of earth
A
View full question & answer→
MCQ 121 Mark
The value of escape velocity from the surface of Moon is less than that from the surface of the Earth. Because:
  • A
    There is no atomosphere on the Moon whereas it is present on the Earth
  • ✓
    The radius of the Moon is less than the radius of the Earth
  • C
    The moon is close to the sun
  • D
    The mass of the moon is less
Answer
Correct option: B.
The radius of the Moon is less than the radius of the Earth
B
View full question & answer→
MCQ 131 Mark
If the Earth stops rotating on its axis, then the value of g at the equator will be:
  • ✓
    will increase
  • B
    will decrease
  • C
    will remain unchanged
  • D
    None of these
Answer
Correct option: A.
will increase
A
On the sign equinox line $g^{\prime}=g-\omega^2 R$ when $\omega=0$, value of $g^{\prime}$ increase
View full question & answer→
MCQ 141 Mark
If the distance of the Earth from the sun is one fourth of the present distance then the duration of the year will be:
  • A
    half of the present
  • ✓
    one eight of the present
  • C
    one fourth of the present
  • D
    will remain unchanged
Answer
Correct option: B.
one eight of the present
B
From Kepler's law $T ^2 \propto r^3 \therefore T \propto r^{3 / 2}$ when value of $r$ becomes one fourth then value of T becomes one eight.
View full question & answer→
MCQ 151 Mark
What would be the reason for the absence of atmosphere on the Moon?
  • A
    The moon is quite light.
  • B
    The moon revolves around the Earth.
  • ✓
    The value of root mean square velocity of gas molecules is more than the escape velocity.
  • D
    All of the above.
Answer
Correct option: C.
The value of root mean square velocity of gas molecules is more than the escape velocity.
C
The root mean square velocity of gas molecules is more than the escape velocity.
View full question & answer→
MCQ 161 Mark
An object performs action due to force acting towards a point. The mgnitude of force is inversely proportional to the square of the distance. The path of the object will be:
  • ✓
    Ellipse
  • B
    Hyperbola
  • C
    Circle
  • D
    Parabola
Answer
Correct option: A.
Ellipse
A
$F \propto \frac{1}{r^2}$, If this happens then the path of the object will be elliptical, hence the correct option is (A).
View full question & answer→
Generate Paper FreeAll PART - 1 CH - 7 Gravitation topics
M.C.Q (1 Marks) - Physics STD 11 Science Questions - Vidyadip