Indian Studies of Solar Coronal Mass Ejections

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What is the main cause of solar coronal mass ejections?

  1. Solar flares

  2. Sunspots

  3. Prominences

  4. Coronal holes


Correct Option: A
Explanation:

Solar flares are sudden, intense bursts of energy that occur in the Sun's atmosphere. They are caused by the sudden release of magnetic energy stored in the Sun's corona. This energy release can cause a coronal mass ejection, which is a large eruption of plasma and magnetic fields from the Sun's corona.

What are the effects of solar coronal mass ejections on Earth?

  1. Geomagnetic storms

  2. Auroras

  3. Radio blackouts

  4. All of the above


Correct Option: D
Explanation:

Solar coronal mass ejections can have a variety of effects on Earth, including geomagnetic storms, auroras, and radio blackouts. Geomagnetic storms are caused by the interaction of the solar wind with Earth's magnetic field. They can cause disruptions to power grids, communications systems, and GPS navigation. Auroras are caused by the interaction of the solar wind with Earth's atmosphere. They are visible in the sky as colorful displays of light. Radio blackouts are caused by the absorption of radio waves by the ionized gas in the Earth's atmosphere. They can disrupt radio communications and navigation systems.

Which Indian satellite was launched to study solar coronal mass ejections?

  1. Chandrayaan-1

  2. Mangalyaan

  3. Aditya-L1

  4. None of the above


Correct Option: C
Explanation:

Aditya-L1 is an Indian satellite that was launched in 2023 to study solar coronal mass ejections. It is the first Indian satellite to be dedicated to the study of the Sun. Aditya-L1 will study the Sun's corona, which is the outermost layer of the Sun's atmosphere. The satellite will also study the Sun's magnetic field and the solar wind.

What are the main goals of the Aditya-L1 mission?

  1. To study the Sun's corona

  2. To study the Sun's magnetic field

  3. To study the solar wind

  4. All of the above


Correct Option: D
Explanation:

The main goals of the Aditya-L1 mission are to study the Sun's corona, the Sun's magnetic field, and the solar wind. The mission will also study the Sun's influence on Earth's climate and space weather.

When was the Aditya-L1 satellite launched?

  1. 2020

  2. 2021

  3. 2022

  4. 2023


Correct Option: D
Explanation:

The Aditya-L1 satellite was launched on July 20, 2023.

What is the expected lifespan of the Aditya-L1 mission?

  1. 5 years

  2. 10 years

  3. 15 years

  4. 20 years


Correct Option: B
Explanation:

The expected lifespan of the Aditya-L1 mission is 10 years.

What is the total cost of the Aditya-L1 mission?

  1. Rs. 1,000 crore

  2. Rs. 2,000 crore

  3. Rs. 3,000 crore

  4. Rs. 4,000 crore


Correct Option: B
Explanation:

The total cost of the Aditya-L1 mission is Rs. 2,000 crore.

Which Indian space agency is responsible for the Aditya-L1 mission?

  1. Indian Space Research Organisation (ISRO)

  2. National Aeronautics and Space Administration (NASA)

  3. European Space Agency (ESA)

  4. Japan Aerospace Exploration Agency (JAXA)


Correct Option: A
Explanation:

The Indian Space Research Organisation (ISRO) is responsible for the Aditya-L1 mission.

What is the name of the instrument on board the Aditya-L1 satellite that will study the Sun's corona?

  1. Visible Emission Line Coronagraph (VELC)

  2. Extreme Ultraviolet Imager (EUVI)

  3. Solar X-ray Imager (SXI)

  4. All of the above


Correct Option: D
Explanation:

The Aditya-L1 satellite carries three main instruments: the Visible Emission Line Coronagraph (VELC), the Extreme Ultraviolet Imager (EUVI), and the Solar X-ray Imager (SXI). These instruments will study the Sun's corona, the Sun's magnetic field, and the solar wind.

What is the expected impact of the Aditya-L1 mission on the study of solar coronal mass ejections?

  1. It will provide new insights into the causes of solar coronal mass ejections

  2. It will help us to better predict solar coronal mass ejections

  3. It will help us to develop new technologies to protect Earth from the effects of solar coronal mass ejections

  4. All of the above


Correct Option: D
Explanation:

The Aditya-L1 mission is expected to have a major impact on the study of solar coronal mass ejections. It will provide new insights into the causes of solar coronal mass ejections, help us to better predict solar coronal mass ejections, and help us to develop new technologies to protect Earth from the effects of solar coronal mass ejections.

Which Indian scientist is the principal investigator of the Aditya-L1 mission?

  1. Dr. K. Shivan

  2. Dr. R. Aravamudhan

  3. Dr. G. Madhavan Nair

  4. Dr. U. R. Rao


Correct Option: A
Explanation:

Dr. K. Shivan is the principal investigator of the Aditya-L1 mission.

What is the name of the Indian ground station that will receive data from the Aditya-L1 satellite?

  1. ISRO Telemetry, Tracking and Command Network (ISTRAC)

  2. Deep Space Network (DSN)

  3. European Space Tracking (ESTRACK)

  4. None of the above


Correct Option: A
Explanation:

The ISRO Telemetry, Tracking and Command Network (ISTRAC) is the Indian ground station that will receive data from the Aditya-L1 satellite.

How many times per day will the Aditya-L1 satellite orbit the Earth?

  1. 1

  2. 2

  3. 3

  4. 4


Correct Option: A
Explanation:

The Aditya-L1 satellite will orbit the Earth once per day.

What is the distance between the Aditya-L1 satellite and the Earth?

  1. 1.5 million kilometers

  2. 2 million kilometers

  3. 2.5 million kilometers

  4. 3 million kilometers


Correct Option: A
Explanation:

The distance between the Aditya-L1 satellite and the Earth is 1.5 million kilometers.

What is the name of the Indian spaceport from which the Aditya-L1 satellite was launched?

  1. Satish Dhawan Space Centre

  2. Sriharikota Range

  3. Thumba Equatorial Rocket Launching Station

  4. None of the above


Correct Option: A
Explanation:

The Aditya-L1 satellite was launched from the Satish Dhawan Space Centre in Sriharikota, Andhra Pradesh.

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