Question Discussion & Solution

The pattern followed is:

Hence, the correct answer is "72".

The correct answer is Memory.

Key Points

• The memory mapping process is handled by the virtual memory manager, which is the same subsystem responsible for dealing with the page file.
• Memory-mapped files are loaded into memory one entire page at a time.
• The page size is selected by the operating system for maximum performance. 

Additional Information

• A memory
  • It is just like a human brain.
  • It is used to store data and instructions. 
  • Computer memory is the storage space in the computer, where data is to be processed and instructions required for processing are stored.
  • The memory is divided into a large number of small parts called cells.
• Process
  • It is the instance of a computer program that is being executed by one or many threads.
  • It contains the program code and its activity.
  • Depending on the operating system, a process may be made up of multiple threads of execution that execute instructions concurrently.
• A computer file
  • It is a computer resource for recording data in a computer storage device.
  • Just as words can be written to paper, so can data be written to a computer file.
  • Files can be edited and transferred through the Internet on that particular computer system.
• Computer security
  • cybersecurity or information technology security is the protection of computer systems and networks from information disclosure, theft of or damage to their hardware, software, or electronic data, as well as from the disruption or misdirection of the services they provide.

The correct answer is chemical energy.

Key Points

• The dry cell is a type of electric battery which is used for portable electrical devices.
• Electricity is produced through the dry cells from electrochemical energy. Hence, Option 1 is correct.
• A common dry cell is a zinc-carbon cell.
• The electrolyte is immobilized as a paste by a dry cell, with just enough humidity in it to allow current to flow.
• Like a wet cell, a dry cell can work without spilling in any direction, because there is no free liquid in it.
• The versatility makes it ideal for mobile devices.
• The first wet-cell batteries, in comparison, were usually fragile glass containers featuring lead rods sticking from an open-top.
• Hence, they required careful handling to prevent spillage.
• The dry-cell battery development made a significant advance in battery safety and portability.
• Batteries render electricity from chemical energy.
• Batteries consist of one or more different parts, or cells, which contain an electrolyte called a chemical.
• Every cell has two electrodes that are electrically conductive immersed in its electrolyte.
• The electrodes consist of different materials; one releases electrons into the electrolyte, and the other absorbs them.
• Once an electrical system is attached to the electrodes, an electrical current passes through it and supports its operation with electric power.
• The energy contained in the dry cell is therefore in the form of chemical energy.

Additional Information

• Thermal energy
  • It is also called heat energy 
  • It is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other.
  • The energy that comes from the temperature of the heated substance is called thermal energy.
  • Thermal energy is energy that comes from a substance whose molecules and atoms are vibrating faster due to a temperature rise.
• In physical sciences, mechanical energy
  • It is the sum of potential energy and kinetic energy.
  • It is the macroscopic energy associated with a system.
  • The principle of conservation of mechanical energy states that if an isolated system is subject only to conservative forces, then the mechanical energy is constant.
• Nuclear power
  • It is the use of nuclear reactions to produce electricity.
  • Nuclear power can be obtained from nuclear fission, nuclear decay, and nuclear fusion reactions.
  • Presently, the vast majority of electricity from nuclear power is produced by nuclear fission of uranium and plutonium in nuclear power plants.

The correct answer is Ganga Singh.

Key Points

• Ganga Singh-
  • He was the younger brother of Dungar Singh.
  • He is known as Rajasthan's Bhagirath.
  • He took part in all three round table conferences.
  • He built Lalgarh palace in memory of his father Lal Singh.

Additional Information

• Rav Beeka-
  • He was the son of Rav Jodha.
  • Firstly, He established Kodamdesar as a capital.
  • He built the Bhairav temple in Kodamdesar.
  • He established Bikaner's Rathore dynasty.
  • He also established Bikaner city in 1488 AD.
  • He is also known as Jangaldhar Badshah. 
• Rai Singh-
  • He was the son of Rav Kalyanmal.
  • He went to Nagore Darbar in 1570 AD and became a member of the Royal army.
  • His daughter was married to Shajade Salim.
  • Akbar gave Rai title to him.
• Sardar Singh-
  • He was the only Rajasthani ruler who gave support to Britishers in 1857's revolt out of Rajasthan.
  • Britishers gave him 41 villages of Tibbi Pargana in reward for his service.
  • He was the first to prohibit Sati tradition in Bikaner.

Detailed Video Concept and solution

Levers are classified into three types or class based on the position of load and effort on the fulcrum;

Class 1 Lever:

• A Class 1 lever has the fulcrum placed between the effort and load
• The movement of the load is in the opposite direction of the movement of the effort
• E.g. crowbars, scissors, pliers, tin snips and seesaws

Class 2 Lever

• A Class 2 lever has the load between the effort and the fulcrum
• In this type of lever, the movement of the load is in the same direction as that of the effort
• E.g. nutcrackers, wheelbarrows, doors, and bottle openers

Class 3 lever

• A Class 3 lever has the effort between the load and the fulcrum
• Both the effort and load are in the same direction
• E.g. tweezers, arm hammers, and shovels