Tag: properties of stars

Questions Related to properties of stars

The light from the sun to reach the surface of the earth takes about _____.

  1. $8$ min

  2. $8.3$ min

  3. $6$ min

  4. $7$ min


Correct Option: B
Explanation:

The light from the sun to reach the surface of the earth takes about 8 min 20 sec.

Ans: 8 min 20 sec

The pearly white crown surrounding the sun visible during the total eclipses of the sun is

  1. its chromosphere

  2. photosphere

  3. corona

  4. heliosphere


Correct Option: C
Explanation:

Pearly white crown surrounding the sun visible during the total eclipse of sun is corona.

Ans: corona

Continuous observations of sun spots formation has revealed that the region or band of sun spots first form at mid-latitudes, widen and then move

  1. towards poles

  2. sideward

  3. towards the equator

  4. upper latitudes


Correct Option: C
Explanation:

Sun spots form at mid latitudes and move towards equator.

Ans: towards the equator 

It was observed that there was a pattern to the increase and decrease in the number of sun spots forming a cycle with a period of

  1. $11$ years

  2. $22$ years

  3. $33$ years

  4. $27$ years


Correct Option: A
Explanation:

Number of sun spots increase and decrease in a span of 11 years.

Ans: 11 years

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

  1. $11$ years

  2. $22$ years

  3. $33$ years

  4. $44$ years


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.

  1. heat

  2. light

  3. electromagnetic

  4. magnetic


Correct Option: D

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

  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


Correct Option: C
Explanation:

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

Heliosphere is

  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


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.

  1. 99

  2. 99.8

  3. 89.9

  4. 88.8


Correct Option: B
Explanation:
Ans is 99.8

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

  1. sunspots

  2. sunpots

  3. sun image

  4. sun dots


Correct Option: A
Explanation:

Irregular patches in the image of sun are sunspots.

Ans: Sunspots