General Studies

Bread and butter, car and petrol are examples of goods having joint demand. Joint demand occurs when two goods are consumed together - one is useless without the other. Bread requires butter to be eaten as intended, and cars require petrol to function. These are complementary goods where the demand for one creates demand for the other. This differs from composite demand (multiple uses of same good), derived demand (demand dependent on another product), or autonomous demand (independent demand).

India's maximum imports are of petroleum products, making crude oil and petroleum the country's largest import category. India imports over 80% of its crude oil requirements due to limited domestic production and high energy demands. This import dependency significantly impacts India's trade balance and economic policy. While gems and jewellery are also major imports for processing and re-export, and iron ore was historically imported, petroleum consistently remains the largest import by value.

The Supreme Court of India acts as a federal court when dealing with inter-state disputes between states or between a state and the Union government. Under Article 131 of the Constitution, the Supreme Court has original jurisdiction in such disputes. This federal court function is distinct from its role as the highest appellate court for civil and criminal matters. Inter-state water disputes, boundary disputes, or conflicts over resources fall under this federal jurisdiction, making the Supreme Court the guardian of federal structure.

Martin Luther King Jr. was the prominent civil rights leader who advocated nonviolent resistance to achieve equality for African Americans. His leadership during the Civil Rights Movement, including the Montgomery Bus Boycott and March on Washington, was instrumental in advancing civil rights legislation.

Raja Rammohan Roy was a pioneer of the western system of education in India. He founded institutions like the Hindu College in Calcutta and advocated for modern, scientific education combined with traditional Indian learning, making him a key figure in introducing Western educational principles to India.

Justice M. Hidayatulla served as Acting President of India in 1969 when the then President Zakir Hussain died in office and Vice President V.V. Giri resigned to contest presidential elections. As the Chief Justice of India at the time, he performed the duties of President until a new President was elected.

Alzheimer's disease is a progressive neurological disorder that primarily affects the brain, causing memory loss, cognitive decline, and behavioral changes. It is characterized by the accumulation of abnormal protein deposits in brain tissue, leading to the death of brain cells.

A single fixed pulley changes the direction of the applied force, making it more convenient to lift objects by pulling downward instead of upward. While it doesn't provide any mechanical advantage (force multiplier) or efficiency gain, its primary purpose is to allow force application in a more convenient direction.

National Highways are the major roads that connect important cities across different states in India. They are maintained by the National Highways Authority of India (NHAI) and form the backbone of the country's road transportation network, facilitating inter-state travel and commerce.

Isohypse (or Isohypse) is the alternate name for contour lines on a topographic map. These lines connect points of equal elevation above a reference level, usually mean sea level. The term 'isohypse' specifically refers to lines of equal height or elevation.

Muscle fatigue during intense exercise is caused by the accumulation of lactic acid in muscle tissues. When oxygen supply is insufficient for aerobic respiration, muscles switch to anaerobic glycolysis, producing lactic acid as a byproduct. This buildup interferes with muscle contraction and causes the sensation of fatigue.

The number of neutrons in an atom is calculated by subtracting the atomic number (number of protons) from the mass number (total nucleons). For this element: Neutrons = Mass number - Atomic number = 226 - 88 = 138. This element is Radium-226.

Nadir Shah, the Persian ruler, invaded Delhi in 1739 and plundered the Kohinoor Diamond along with other treasures. The diamond had been in the possession of the Mughal emperors, and Nadir Shah took it after defeating Muhammad Shah in the Battle of Karnal, later giving it the name Kohinoor (Mountain of Light).

When the government's main objective is to raise revenue, it should tax commodities with low elasticity of demand. This is because consumers will continue to purchase these goods even when prices increase, leading to stable tax revenue. High elasticity demand would cause significant consumption reduction, reducing total tax collected.

Bharatanatyam is a classical dance form from Tamil Nadu, recognized as one of the eight classical dances of India. It has ancient origins, dating back to the Natya Shastra, and is characterized by intricate footwork, expressive gestures (mudras), and elaborate costumes. It has a formal structure and is performed to Carnatic music.

Full employment in economics means a situation where there is no involuntary unemployment - everyone who is willing and able to work at the prevailing wage rate can find a job. It does not mean zero unemployment, as voluntary unemployment (people choosing not to work) may still exist.

Tenzin Gyatso is the 14th and current Dalai Lama, the spiritual leader of Tibetan Buddhism. He was born in 1935 and was recognized as the Dalai Lama at the age of 2. He received the Nobel Peace Prize in 1989.

Under Article 80(3) of the Indian Constitution, the President has the authority to nominate 12 members to the Rajya Sabha with expertise in fields such as literature, science, art, and social service. These nominated members serve six-year terms.

The Equator is the greatest circle on Earth as it has the largest diameter among all circles of latitude. It divides the Earth into Northern and Southern Hemispheres and is approximately 40,075 km in circumference. The tropics and polar circles are all smaller circles.

The Speaker of the Lok Sabha presides over joint sittings of Parliament under Article 108(4) of the Constitution. Joint sittings are called to resolve deadlocks between the two Houses on ordinary bills, and the Speaker's vote is decisive in case of a tie.

The Andaman and Nicobar Islands host a biosphere reserve specifically designed to preserve diverse submarine flora and fauna. The Mahatma Gandhi Marine National Park and other protected areas in these islands conserve coral reefs, marine life, and coastal ecosystems unique to this region.

Hypermetropia (long-sightedness) occurs when the eyeball is too short or the cornea has too little curvature, causing light to focus behind the retina instead of on it. Convex lenses are converging lenses that add optical power to bring the focal point forward onto the retina, effectively correcting the vision defect. Concave lenses would worsen the condition by diverging light further, while cylindrical lenses correct astigmatism and bifocals address presbyopia.

Raja Todarmal was Akbar's Finance Minister and the chief architect of the zabt system, a revolutionary revenue settlement based on systematic land measurement and classification. His system calculated land revenue as a percentage of the average produce for different crop types, ensuring more consistent and fair taxation across the empire. This sophisticated administrative innovation became a model for later revenue systems in India.

Plants produce carbohydrates through photosynthesis, converting light energy, water, and carbon dioxide into glucose and other carbohydrate molecules. This makes plants the primary producers of carbohydrates in virtually all ecosystems, forming the base of food chains. Marine animals, coal tar, and crude oil either consume carbohydrates or are derived from ancient plant matter, but only plants actively synthesize carbohydrates from inorganic sources.