Question Discussion & Solution

Given that Mars, Planets, Celestial Bodies.

All Mars situated in Planets and all Planets are situated in Celestial Bodies.

The Venn diagram given bellow-

Hence, option 1 is the correct answer.

The correct answer is Hygrometer.

Key Points

• Hygrometer
  • A hygrometer is an instrument for measuring the relative humidity of the atmosphere.
  • The hygrometer was invented by Leonardo da Vinci.

Additional Information

• ​Barometer
  • A barometer is an instrument used to measure atmospheric pressure.
  • The barometer was invented by Torricelli.
• Hydrometer
  • A hydrometer is an instrument used to measure the specific gravity of liquids.
  • The hydrometer was invented by Nicholson.
• ​Anemometer
  • An anemometer is an instrument used to measure the velocity of wind and directions.
  • The anemometer was invented by Leon Alberti.

The correct answer is Social Justice and Empowerment.

• As of June 2020, Master Bhanwarlal Meghwal is the Cabinet Minister of Social Justice and Empowerment in Rajasthan.

Key Points

• Bhanwarlal Meghwal is a politician belonging to the Indian National Congress.
• His constituency is Sujangarh Churu, Rajasthan.
• He has served as Cabinet Minister of Social Justice and Empowerment in Rajasthan State Government.
• He also served as the Education Minister.

Additional Information

• Ministry of Social Justice and Empowerment:
  • It is responsible for welfare, social justice, and empowerment of marginalized sections of society like SCs, STs, and LGBTQ, etc.
  • At the centre, Thaawar Chand Gehlot is the Minister of Social Justice and Empowerment.
• Rajasthan:
  • Lok Sabha seat: 25
  • Number of Constituencies: 200

The correct answer is Hard Disk.

• In a typical desktop computer,  Hard disk memory sizes would be the largest.
• had a capacity of 1 to 8 terabytes, with the largest-capacity drives reaching 20 terabytes (single-disk drives, "dual" drives are available up to 24 TB).
• Smaller, laptop internal 2.5-inch drives, are available up to 5 TB.
  • Register> RAM> Cache> Hard disk.

​​Key Points

• RAM 
  • RAM is a hardware element where the data being currently used is stored.
  • It is a volatile memory.
  • Two types of RAM are
    • Static RAM, or (SRAM) and
    • Dynamic RAM, or (DRAM).
• Register
  • A register holds instructions or data that the processor is working on or will be working on shortly.
  • They form part of the processor and are capable of holding only one item at a time.
• Cache 
  • Cache memory is an area in the computer where codes and instructions are stored.
• Hard disk
  • A hard disk drive is an electromechanical data storage device that stores and retrieves digital data using magnetic storage.

Additional Information

• There are four major storage levels on the computer:
  • Internal – 
    • Processor registers and cache.
  • Main –
    • The system RAM and controller cards.
  • On-line mass storage –
    • Secondary storage.
  • Off-line bulk storage –
    • Tertiary and Off-line storage.

• Becquerel is the SI unit of radioactivity.
• 1 Becquerel = 1 disintegration/Second
  • Disintegration: As the radioactive elements are unstable they will disintegrate at any moment by emitting alpha or beta particles and form new elements called daughter elements which are completely different in both physical and chemical properties when compared to the elements they came from.
  • The rate of disintegration does not depend upon external factors like temperature, pressure, etc.