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Physics M.C.Q (1 Marks)

Universe · MP Board (MPBSE) STD 12 Science (Madhya Pradesh - English Medium). 72 questions.

Questions · Page 2 of 2

M.C.Q (1 Marks)

MCQ 511 Mark
Towards the centre of sun
  • A
     Density decreases
  • B
     Pressure decreases
  • C
     Temperature decreases
  • ✓
     Density and pressure increases
Answer
Correct option: D.
 Density and pressure increases
Density and pressure increases
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MCQ 521 Mark
The hottest planet of solar system is
  • A
    Mars
  • ✓
     Mercury
  • C
     Venus
  • D
    Pluto
Answer
Correct option: B.
 Mercury
 Mercury
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MCQ 531 Mark
Hubble's law states that the velocity with which the 'milky way' is moving away from the earth is proportional to
  • A
     Square of the distance of the milky way from the earth
  • ✓
     Distance of milky way from the earth
  • C
     Mass of the milky way
  • D
     Product of the mass of the milky way and its distance from the earth
Answer
Correct option: B.
 Distance of milky way from the earth
Distance of milky way from the earth
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MCQ 541 Mark
Which of the following planets have rings around it
  • A
    Uranus
  • B
     Mars
  • C
     Jupiter
  • ✓
     Saturn
Answer
Correct option: D.
 Saturn
Saturn
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MCQ 551 Mark
There is no atmosphere on moon because
  • A
     There is no vegetation
  • ✓
    The escape velocity at its surface is very low
  • C
    Diffusion constant of gases is high
  • D
    There is vacuum in space
Answer
Correct option: B.
The escape velocity at its surface is very low
 The escape velocity at its surface is very low
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MCQ 561 Mark
Venus appears brighter than other stars because
  • A
     It is heavier than other planets
  • B
     Its density is more than other planets
  • ✓
     It is nearer to earth in comparison to other planets
  • D
     Nuclear fusion takes place at its surface
Answer
Correct option: C.
 It is nearer to earth in comparison to other planets
It is nearer to earth in comparison to other planets
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MCQ 571 Mark
Sun radiates continuously and maintains its brightness because
  • A
    Helium is converted into iron in its core
  • ✓
     Of fusion of hydrogen nuclei into helium
  • C
     Fusion of helium in hydrogen
  • D
     Burning of carbon, in its core
Answer
Correct option: B.
 Of fusion of hydrogen nuclei into helium
 Of fusion of hydrogen nuclei into helium
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MCQ 581 Mark
Asteroids are
  • ✓
     Small planets
  • B
     Shooting stars
  • C
     Found in a belt between Earth ad Venus
  • D
     None of these
Answer
Correct option: A.
 Small planets
 Small planets
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MCQ 591 Mark
Source of Sun's energy is
  • A
    Burning of hydrogen
  • B
    Fission reactions involving hydrogen
  • ✓
     Fusion reactions involving hydrogen
  • D
     Some other source
Answer
Correct option: C.
 Fusion reactions involving hydrogen
 Fusion reactions involving hydrogen
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MCQ 601 Mark
A planet which is born sister of earth is
  • A
    Mercury
  • ✓
     Venus
  • C
     Mars
  • D
    Jupiter
Answer
Correct option: B.
 Venus
Venus
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MCQ 611 Mark
The age of universe is believed to be
  • A
     1 billion years
  • B
     10 billion years
  • ✓
     10-20 billion years
  • D
     1000 billion years
Answer
Correct option: C.
 10-20 billion years
10-20 billion years
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MCQ 621 Mark
A planet of mass M has a satellite of mass m, revolving around the planet in a circular orbit of radius r and time period T. The mass (M) of the planet is
 
  • ✓
    $\frac{4 \pi^2 r^3}{G T^2}$
  • B
    $\frac{4 \pi^2 r ^2}{ GT ^3}$
  • C
    $\frac{ GT ^2}{4 \pi r ^8}$
  • D
    $\frac{ r ^8 G }{4 \pi T ^2}$
Answer
Correct option: A.
$\frac{4 \pi^2 r^3}{G T^2}$
(a) $\frac{4 \pi^2 r^3}{G T^2}$
Correct option is A. $\frac{4 \pi^3 r^3}{G T^2}$
$F=\frac{G M m}{r^2}=m r \omega^2=m r\left(\frac{2 \pi}{T}\right)^2$
$M=\frac{m r^3 4 \pi^2}{G m T^2}=\frac{4 \pi^3 r^3}{G T^2}$
 
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MCQ 631 Mark
Black hole is a
  • A
    Hole in the ozone layer of atmosphere
  • B
     Hole in earth's centre
  • ✓
    Highly dense matter available in the atmosphere
  • D
     Hole in troposphere
Answer
Correct option: C.
Highly dense matter available in the atmosphere
Highly dense matter available in the atmosphere
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MCQ 641 Mark
The wavelength of maximum energy, released during an atomic explosion, was $2.93 \times 10^{-10} \mathrm{~m}$. Given that the Wien's constant is $2.93 \times 10^{-3} \mathrm{~m} \mathrm{~K}$, the maximum temperature attained must be of the order of
  • A
    $ 10^{-7} \mathrm{~K} $
  • ✓
    $ 10^7 \mathrm{~K} $
  • C
    $ 10^{-13} \mathrm{~K} $
  • D
    $ 5.86 \times 10^7 \mathrm{~K} $
Answer
Correct option: B.
$ 10^7 \mathrm{~K} $
$ 10^7 \mathrm{~K} $
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MCQ 651 Mark
$\mathrm{CO}_2$ gas is found in which of the following pairs of the planet 
  • A
    Earth and Mercury
  • B
    Mercury and Saturn
  • C
    Venus and Saturn
  • ✓
    Venus and Mars
Answer
Correct option: D.
Venus and Mars
(d) Venus and Mars
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MCQ 661 Mark
The solar constant on the surface of the earth is S. What will be its value on the surface of another planet which is about 5.3 A.U. away from sun
  • A
    $\frac{S}{5.3}$
  • ✓
    $\frac{S}{(5.3)^2}$
  • C
    $5.3 S$
  • D
    $(5.3)^2 S$
Answer
Correct option: B.
$\frac{S}{(5.3)^2}$
(b) $\frac{S}{(5.3)^2}$
Solar constant is the energy crossing per unit area per sec at earth's distance, area being normal to the sun's rays. Also energy galling is inversely proportional to the square of distance from the source.
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MCQ 671 Mark
Hubble showed that the universe as a whole is expanding and the distant stars are receding from us. The spectral line from a star, when compared with the corresponding line from an source will then show
  • ✓
     A shift in frequency towards the red end
  • B
    A shift in frequency towards the violet end
  • C
    No shift in frequency at all
  • D
     A shift in frequency towards the violet end as well as a decrease in intensity
Answer
Correct option: A.
 A shift in frequency towards the red end
A shift in frequency towards the red end
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MCQ 681 Mark
A study of binary stars is most helpful in
  • A
    Finding their distances
  • B
    Finding their temperature
  • C
     Finding their masses
  • ✓
     Verifying Newton's force law of gravitation
Answer
Correct option: D.
 Verifying Newton's force law of gravitation
 Verifying Newton's force law of gravitation
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MCQ 691 Mark
A group of bright and faint stars is called
  • A
     Galaxy
  • B
     Comet
  • C
     Black hole
  • ✓
     Constellation
Answer
Correct option: D.
 Constellation
Constellation
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MCQ 701 Mark
According to modern astronomers into how many constellations, the whole sky is divided
  • A
    $10^{11}$
  • ✓
    88
  • C
    880
  • D
    5000
Answer
Correct option: B.
88
(b) 88
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MCQ 711 Mark
Which of the following theories is the most satisfactory about the origin of the universe
  • ✓
    Big Bang theory
  • B
     Pulsating theory
  • C
     Steady state theory
  • D
    None of these
Answer
Correct option: A.
Big Bang theory
 Big Bang theory
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M.C.Q (1 Marks) - Page 2 - Physics STD 12 Science Questions - Vidyadip