Spintronics
Science & Technology
- PYQs8
- Articles1
Background
As a cutting-edge field, spintronics represents a significant leap in computing and data storage, aligning with UPSC's focus on emerging technologies that can transform digital infrastructure, national security, and economic competitiveness.
Spintronics, or spin electronics, is an emerging technology that exploits the intrinsic angular momentum (spin) of electrons, in addition to their fundamental electronic charge, to store, process, and transmit information, offering potential advantages over conventional electronics.
Facts & tables
- Principle
- Utilizes the magnetic spin of electrons, not just their charge, for data storage and movement.
- Goal
- Aims to create faster, more energy-efficient, and non-volatile electronic devices.
- Frequency Requirement
- Requires high-frequency (terahertz) vibrations for advanced applications.
- Future Potential
- Considered a potential successor or complement to traditional charge-based electronics.
| Type | Reference |
|---|---|
| Conceptual area | Quantum Computing |
Prelims angle
Prelims angle: Multi-statement analysis
Prelims angle: Conceptual understanding
- Uses electron's magnetic spin for data.
- Aims for faster, energy-efficient devices.
- Potential successor to charge-based electronics.
- Requires THz frequencies for advanced use.
- Key for next-gen computing.
| Year | Framing tags |
|---|---|
| 2026 | Statement-based questions, Factual recall |
| 2026 | Multi-statement analysis, Conceptual understanding |
| 2026 | Multi-statement analysis, Factual recall |
| 2026 | Multi-statement analysis, Factual recall |
| 2025 | Statement-based questions, Factual recall |
| 2022 | Multi-statement analysis, Conceptual understanding |
| 2022 | Multi-statement analysis, Conceptual understanding |
| 2017 | Factual recall, Multi-statement analysis |
Timeline
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Quantum Computing
Conceptual area
-
Prelims 2017
Factual recall, Multi-statement analysis
-
Prelims 2022
Multi-statement analysis, Conceptual understanding
-
Prelims 2022
Multi-statement analysis, Conceptual understanding
-
Prelims 2025
Statement-based questions, Factual recall
-
Prelims 2026
Statement-based questions, Factual recall
-
Prelims 2026
Multi-statement analysis, Conceptual understanding
-
Prelims 2026
Multi-statement analysis, Factual recall
-
Prelims 2026
Multi-statement analysis, Factual recall
-
Laser strums atoms trillions of times in search for better computers
An advanced technology that leverages the electron's magnetic spin for information processing, promising faster, more energy-efficient, and non-volatile computing solutions beyond conventional charge-based electronics.
See also
Past papers
2017–2026 · 8 questions
In the news
Laser strums atoms trillions of times in search for better computers
An advanced technology that leverages the electron's magnetic spin for information processing, promising faster, more energy-efficient, and non-volatile computing solutions beyond conventional charge-based electronics.
Try these PYQs
With reference to “Software as a Service (SaaS)”, consider the following statements:
1. SaaS buyers can customize the user interface and can change data fields.
2. SaaS users can access their data through their mobile devices.
3. Outlook, Hotmail and Yahoo! Mail are forms of SaaS.
Which of the statements given above are correct?
Statement 1 is correct. In many cases, Software as a Service (SaaS) providers allow some degree of customization of the user interface and data fields to meet the specific needs of their customers. Statement 2 is correct. One of the key benefits of SaaS is its accessibility from anywhere with an internet connection, including mobile devices such as smartphones and tablets. SaaS applications are often designed to be mobile-friendly, allowing users to access their data and perform tasks on the go. Statement 3 is correct. Outlook, Hotmail, and Yahoo! Mail are examples of web-based email services that operate on the SaaS model. Users access these email services through web browsers without needing to install or maintain any software locally on their devices. The email data is stored and managed remotely on servers operated by the service providers. Therefore, all statements are correct.
With reference to Web 3-0, consider the following statements :
1. Web 3-0 technology enables people to control their own data.
2. In Web 3-0 world, there can be blockchain based social networks.
3. Web 3-0 is operated by users collectively rather than a corporation.
Which of the statements given above are correct?
Statement 1 is correct. A key aspect of Web 3.0 is the concept of decentralization, where users have more control and ownership over their personal data, rather than having it stored and controlled by centralized platforms. Statement 2 is correct. Blockchain technology is a core component of Web 3.0, and it can enable the creation of decentralized, user-owned social networks and platforms. Statement 3 is correct. The decentralized nature of Web 3.0 means that it is not controlled by a single corporation or entity, but rather operated and maintained collectively by the users and participants in the network. Therefore, all three statements regarding Web 3.0 are correct.
GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN?
I. It is designed to provide additional accuracy and integrity.
II. It will allow more uniform and high quality air traffic management.
III. It will provide benefits only in aviation but not in other modes of transportation.
Select the correct answer using the code given below.
✅ Statement I: Correct
*GAGAN is an Indian SBAS developed by ISRO and AAI to enhance GPS accuracy and integrity, crucial for aviation safety.* ✅ Statement II: Correct
*It improves GPS reliability and accuracy, enabling better air traffic management and safer, efficient navigation.* ❌ Statement III: Incorrect
*GAGAN’s benefits extend beyond aviation to railways, roadways, maritime, agriculture, and disaster management.* Correct Answer: Only Statements I and II are correct.
Consider the following statements with reference to the Sagarmala Programme of the Government of India :
I. The Sagarmala Programme seeks to achieve port-led economic growth through cost-effective and sustainable coastal infrastructure.
II. The success of the Sagarmala Programme is reflected in significant growth in coastal and inland waterway shipping, along with improved global port rankings.
III. Sagarmala 2.0 aims to position India as a global maritime innovation hub aligned with Atmanirbhar Bharat and Viksit Bharat 2047 visions.
Which of the following relationships among the above statements is/are correct ?
1. Statement II validates the effectiveness of the strategies envisioned in statement I.
2. Statement III extends the objectives of statement I by embedding them into a future-oriented innovation framework.
3. Statement I contradicts statement III by focusing only on traditional infrastructure instead of modern innovation.
Select the answer using the code given below :
Relationship 1 is Correct: Statement I outlines the core objective of the Sagarmala Programme, launched in 2015, which is port-led economic development through cost-effective and sustainable coastal infrastructure. Statement II provides empirical evidence of its success, such as the 118% growth in coastal shipping, a 700% surge in inland waterway cargo movement, and improved global port rankings (with nine Indian ports now in the global top 100). Thus, the tangible achievements in Statement II directly validate the effectiveness of the foundational strategies mentioned in Statement I. Relationship 2 is Correct: Statement III highlights the goals of Sagarmala 2.0, which focuses on smart ports, green shipping, and positioning India as a global maritime innovation hub aligned with the Viksit Bharat 2047 and Atmanirbhar Bharat visions. This acts as an evolutionary extension of the foundational infrastructure goals in Statement I, embedding them into a broader, future-oriented innovation framework rather than replacing them. Relationship 3 is Incorrect: Statement I does not contradict Statement III. The initial focus on traditional and sustainable coastal infrastructure in the original Sagarmala Programme serves as the necessary physical base upon which the modern innovation and technology-driven goals of Sagarmala 2.0 are built. The two phases are complementary and represent a progressive policy evolution, not a contradiction. Therefore, relationships 1 and 2 are correct, making Option B the correct choice.
Which of the following statements with regard to the National Quantum Mission (NQM) is/are correct?
1. It aims at developing intermediate-scale quantum computers with 50-1000 physical qubits.
2. Its implementation includes setting up of four Thematic Hubs (T-Hubs) in academic and national R&D institutes across India.
Select the answer using the code given below:
Statement 1 is Correct: The National Quantum Mission (NQM) aims to develop intermediate-scale quantum computers with 50 to 1000 physical qubits within 8 years. Specifically, it targets 50–100 physical qubits in 5 years and scales up to 50–1000 physical qubits in 8 years using platforms like superconducting and photonic technology. Statement 2 is Correct: The implementation of the mission explicitly includes the establishment of four Thematic Hubs (T-Hubs) in top academic and national R&D institutes across India. These hubs focus on distinct technology verticals: Quantum Computing (led by IISc Bengaluru), Quantum Communication (led by IIT Madras), Quantum Sensing & Metrology (led by IIT Bombay), and Quantum Materials & Devices (led by IIT Delhi). Therefore, both statements are correct.
Show 3 more PYQs
Which of the following statements with regard to drone swarms is/are correct ?
1. They use Terahertz band of frequency to communicate with the command centre.
2. Individual drones in the swarm can communicate with other drones in the swarm.
3. GPS Spoofing is a commonly used technique to counter drone swarm attack.
Select the answer using the code given below :
Statement 1 is Incorrect: Drones typically communicate with ground command centres using standard Radio Frequency (RF) bands (e.g., UHF, S-band, L-band) or Satellite Communications (SATCOM) to ensure reliable, long-range connectivity. The Terahertz (THz) band is an emerging, highly experimental frequency envisioned for future 6G networks. Because THz waves suffer from severe atmospheric attenuation and have a very short range, they are currently being researched for high-speed inter-drone (drone-to-drone) communication at close proximity, not for long-range links to a command centre. Statement 2 is Correct: The defining characteristic of a drone swarm is decentralized collective intelligence. Individual drones actively communicate with one another (often via ad-hoc mesh networks) to coordinate formations, share sensor data, avoid collisions, and adapt to real-time environmental changes without relying on a central controller. Statement 3 is Correct: Electronic Warfare (EW) is a primary defense against drone swarms. GPS Spoofing is a standard and commonly used countermeasure. It involves broadcasting fake satellite signals to deceive the drones' navigation systems, forcing them off course, causing mid-air collisions, or triggering forced landings. Therefore, option B is the correct answer.
In India, it is legally mandatory for which of the following to report on cybersecurity incidents?
1. Service providers
2. Data centres
3. Body corporate
Select the correct answer using the code given below:
In India, section 70-B of the Information Technology Act, 2000 (the IT Act) gives the Central Government the power to appoint an agency of the government to be called the Indian Computer Emergency Response Team. Further, it is legally mandatory for service providers, data centres and body corporates to report on cybersecurity incidents as outlined in the Information Technology (The Indian Computer Emergency Response Team and Manner of Performing Functions and Duties) Rules, 2013, which were notified under the Information Technology Act, 2000.
Consider the following statements about Mission Sudarshan Chakra of India:
1. It aims to enhance India's air defence, ballistic missile defence and aerial offensive capabilities.
2. This Mission is being designed to enhance rapid, precise, and powerful defence responses, reinforcing India's strategic autonomy.
3. One of the aims of this Mission is to cover all public places of India by an expanded nationwide security shield by 2035.
Which of the statements given above is/are correct?
Statement 1 is Correct: Mission Sudarshan Chakra is designed as a multi-domain security umbrella. It explicitly aims to enhance India's air defence, ballistic missile defence, and aerial offensive capabilities, acting as both a defensive shield and an offensive sword. Statement 2 is Correct: The mission integrates advanced technologies like AI, space-based sensors, and directed energy weapons to ensure rapid, precise, and powerful defence responses. This indigenous development (incorporating projects like Project Kusha) is specifically aimed at reinforcing India's strategic autonomy and self-reliance in the defence sector. Statement 3 is Correct: A major distinguishing feature of this initiative is its expanded scope. Announced as a 10-year national security initiative, a stated goal of the mission is to bring all public places (including hospitals, railways, and religious/cultural sites) under an expanded nationwide security shield by 2035, moving beyond the conventional protection of just military and strategic installations. Therefore, the correct option is A.