Question Discussion & Solution

The pattern is:

15

15 × 3 - 3 = 42;

42 × 4 - 4 = 164

164 × 5 - 5 = 815;

815 × 6 - 6 = 4884

Input Devices:

• Input devices are the component of the computer system that accepts incoming data and instructions.
• It converts them into a pattern of electrical signals in binary code that is understandable to a digital computer.

Output Devices:

• Output devices are the component of a computer system that converts the digitized signals into a form understandable to the user.
• The output devices are generally known as the reverse of input devices.
• Output devices also send data from one computer system to another.

Key Points

•  A Visual Display Unit (VDU) is also referred to as a Monitor and VDU (video display unit), a monitor is an output device that displays video images and text.
• A printer is an external hardware output device that takes the electronic data stored on a computer or other device and generates a hard copy.
• A floppy disk is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic enclosure lined with fabric that removes dust particles. It can be both an input and output device.​

Important Points

The Central Processing Unit (CPU):

• The CPU is the brain of the computer.
• Sometimes referred to simply as the processor or central processor, the CPU is where most calculations take place.
• The CPU executes the programs and controls the operation of all the hardware.
• A central processing unit (CPU), also called a central processor, main processor, or just processor is the electronic circuitry that executes instructions comprising a computer program.
• The CPU performs basic arithmetic, logic, controlling, and input/output (I/O) operations specified by the instructions in the program.

​Thus, CPU is not a computer output device.

Mistake Points

• The question is "Which one is not a computer output device?"
• Floppy is both input and output.
• CPU is the only option that is not an output device.

Additional Information

The basic difference between Input and Output devices:

The correct answer is ​Article 370.

Key Points

• Article 370 of the Indian constitution gave special status to Jammu and Kashmir, which was administered by India as a state from 1954 to 31 October 2019.
• On 5th August 2019, the President of India in the exercise of the powers conferred by Clause (1) of Article 370 of the Constitution had issued the Constitution application to Jammu and Kashmir Order, 2019.
• Article 35A stems from Article 370 and was introduced through a Presidential Order in 1954, on the recommendation of the J&K Constituent Assembly.
• The Jammu and Kashmir Reorganisation Bill, 2019, passed by Parliament divides the state of Jammu and Kashmir into two new Union Territories (UTs) are Jammu & Kashmir, and Ladakh.
  • Kashmir will no longer have a Governor, rather a Lieutenant Governor like other UT.

Additional Information

• Article 360 gives authority to the President of India to declare a financial emergency.
• Article 350A (Facilities for instruction in mother-tongue at the primary stage) provides that it shall be the endeavor of every State and of every local authority within the State to provide adequate facilities for instruction in the mother-tongue at the primary stage of education to children belonging to linguistic minority groups.
• Article 350B (Special Officer for linguistic minorities) provides the power to the President that he can appoint a special officer for linguistic minorities to investigate all matters relating to the constitutional safeguards for linguistic minorities and to report to him.

Important Points

• The Constitution of India talks about three types of emergencies
  • National Emergency in Article 352.
  • President's Rule in State is mentioned under article 356.
  • Financial Emergency in Article 360 of the Indian Constitution.

The correct answer is Nagaland.

• 'Aaluyattu' is a folk dance form from the state of  Nagaland.

Key Points

• Aaluyattu is a folk dance form from the state of  Nagaland.
  • The dance is performed by the Konyak tribe.
  • Other folk dances of Nagaland are Modse, Agurshikukula, Sadal Kekai, Changai Dance, Kuki Dance, Leshalaptu, Khamba Lim, Mayur Dance, Rengma, Monyoasho, Seecha and Kukui Kucho.

Additional Information

• The folk dances of Kerala are Kaikottikali,  Mudiyett, Sangha Kali, Brahmanippattu, Dappu Kali, Kolkali and Vattakkali.
• The folk dances of Haryana are Ghumar, Ras Leela, Phag Dance, Loor, Daph dance.
• The folk dances of Goa are Dekhni, fugdi, Dashavatara, Dhalo, Goff and Kunbi.

CONCEPT:

Equilibrium of a rigid body:

• A rigid body is said to be in mechanical equilibrium if both its linear momentum and angular momentum are not changing with time, or equivalently, the body has neither linear acceleration nor angular acceleration.
• Condition for the mechanical equilibrium:
  1. The total force, i.e. the vector sum of the forces, on the rigid body is zero.
  2. The total torque, i.e. the vector sum of the torques on the rigid body is zero.

⇒ \(\rm\vec{F_1}+\vec{F_2}+...+\vec{F_n}=0\)

⇒ \(\rm \vec{τ_1}+\vec{τ_2}+...+\vec{τ_n}=0\)

• If the forces on a rigid body are acting in the 3 dimensions, then six independent conditions to be satisfied for the mechanical equilibrium of a rigid body.
• If all the forces acting on the body are coplanar, then we need only three conditions to be satisfied for mechanical equilibrium.
• A body may be in partial equilibrium, i.e., it may be in translational equilibrium and not in rotational equilibrium, or it may be in rotational equilibrium and not in translational equilibrium.

EXPLANATION:

• A rigid body is said to be in mechanical equilibrium if both its linear momentum and angular momentum are not changing with time, or equivalently, the body has neither linear acceleration nor angular acceleration.
• We know that the linear acceleration and the angular acceleration of a stationary body are zero.

A book is kept on a table:

• In this case, the book will be stationary so it is an example of the equilibrium of a body.

A ball is moving downward freely under gravity:

• We know that when a ball moves freely under gravity, then only the gravitational force will act on the ball due to which the ball accelerates downward.
• Therefore ball is moving downward freely under gravity is not an example of the equilibrium of a body.
• Hence, option 1 is correct.