Tag: galaxies

Questions Related to galaxies

The sun's magnetic north and south pole get reversed in a cycle of:

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. $11$ years

  2. $22$ years

  3. $33$ years

  4. $44$ years

Show answer
Correct Option: A
Explanation:

Sun's magnetic north and south pole get reversed in a cycle of 11 years. 

Ans: 11years 

A solar flare occurs when .......... energy that has built up in the solar atmosphere is suddenly released.

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. heat

  2. light

  3. electromagnetic

  4. magnetic

Show answer
Correct Option: D

Sun spots are the areas to which the energy produced in the sun's core is unable to reach due to

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. some unknown reasons

  2. inhibitions by the lower layers

  3. inhibition by the strong magnetic field to the convective motion of the evergy

  4. inhibition by the strong gravitational field to the convective motion of the evergy

Show answer
Correct Option: C
Explanation:

Ans: inhibition by strong magnetic field to the convective motion of the energy

Heliosphere is

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. the outermost atmospheric layer of the sun

  2. a bubble in space produced by the solar wind

  3. the innermost layer of the sun

  4. composed of the whole sun with its atmosphere

Show answer
Correct Option: B
Explanation:

Heliosphere is a bubble in space produced by the solar wind.

The mass of the sun is nearly _______ % of the mass of the solar system.

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. 99

  2. 99.8

  3. 89.9

  4. 88.8

Show answer
Correct Option: B
Explanation:
Ans is 99.8

The irregular patches observed in the image of the Sun are called _______ .

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. sunspots

  2. sunpots

  3. sun image

  4. sun dots

Show answer
Correct Option: A
Explanation:

Irregular patches in the image of sun are sunspots.

Ans: Sunspots

Solar flares are associated with.

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. Intense magnetic field

  2. Solar eclipse

  3. Lunar eclipse

  4. Nuclear fission reaction

Show answer
Correct Option: A
Explanation:

Solar flares are associated with intense magnetic field. A solar flare occurs when magnetic energy that has built up in the solar atmosphere is suddenly released.

Which is the part of sun where the energy is transported from superhot interior to cold outer layers by photons?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. Core

  2. Radiative Zone

  3. Convective zone

  4. None

Show answer
Correct Option: B
Explanation:

Radiative zone lies between the core and the convective zone. In radiative zone, energy resulted from the nuclear fusion in the core travels upwards by photons.

Sunspots on the photosphere are due to.

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. Eclipses caused by planets

  2. Comparatively cooler regions

  3. Granulation's

  4. Cloudy weather on the earth

Show answer
Correct Option: B
Explanation:

Sunspots are temporary phenomenon on the sun photosphere that appears as spots darker than the surrounding area.

They are regions of reduced surface temperature. 
Answer is $B$

The reason for enormous energy output of the sun is.

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. Combustion of hydrogen

  2. Formation of helium

  3. Thermo nuclear fusing reaction

  4. Electromagnetic field.

Show answer
Correct Option: B,C
Explanation:

Reason for enormous energy output of sun is the fusion reaction

$H + H \longrightarrow He + Energy$
Answer is $B$ and $C$