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BENNETT, COLEMAN & CO. LTD. | ESTABLISHED 1838 | TIMESOFINDIA.COM | NEW DELHI ➤ ➤ Learn about the Earth’s mag- Our yoga experts tell us ➤ IPL 2021: Can RCB STUDENT EDITION netism, and other laws of physics, why it is very important to manage to hold on TODAY’S explained in a simplified way by do yoga regularly in these their own? TUESDAY, APRIL 27, 2021 Newspaper in stressing times Education EDITION your teacher PAGE 4 PAGE 2 PAGE 3 WEB EDITION CLICK HERE: PAGE 1 AND 2 That's the loss Indian businesses CRISTIANO'Nomadland' RONALDO wins have to bear every year, courtesy BECOMESbig at FOOTBALL'S pandemic HIGHEST-GOAL SCORER $95 air pollution, claims a study. It is Oscars as Zhao makes history 3% of the country's gross BILLION domestic product, and cuts annual consumer spending by $22 billion, the report adds. In cientists have discov- of our sun. It appears to be a com- ered what may be the panion to a red giant star, which is fact, it is 40% of the cost of smallest-known black how scientists were able to find it. hole in the Milky Way Since black holes aren't visible, re- tackling the Covid-19 pandemic, S galaxy and the closest searchers were able to locate this one to the Earth found to date. one after analysing data, docu- and is equivalent to 3% of India's Dubbed, ‘the Unicorn’ the black menting certain changes in the hole is roughly three times the mass companion star. PIC: REPRESENTATIONAL GDP in 2019... S road movie ‘Nomadland’ Uemerged as the big How it affects winner at the Oscars on Sunday with three major India Inc prizes, including a history- Labour productivity takes the biggest toll. making award for director According to experts, Chloe Zhao, as Hollywood cel- lost labour pro- ebrated its most-glamourous ductivity costs night with a unique pandemic- Indian business- era gala. Zhao's drama about es $30billion, marginalised Americans roam- courtesy air pollution, ing the West in vans was hon- as businesses witness oured for the best picture, around 10%net director and actress for decrease in attendance ●The black hole is located about 1,500 light years — the Frances McDormand, who on days, when air now is in elite company with distance light travels in a year, 9.5 trillion km — from the pollution reaches her third Academy Award Earth. While it may be the closest HOW IT AFFECTS hazardous zones 21 of consumer economy for performing. ➤ A luminous one to us, it is still far away. By way HEALTH Similarly, it undermines the of comparison, the closest star to the world's 30 by reducing consumer spending, costing around star called a $22billion in 2019, as consumers avoid exposure No-show Anthony Hopkins our solar system, Proxima Centauri, Air pollution contributes cities with the red giant to pollution, akin to what is being observed dur- pulled a surprise upset to is 4 light years away to 18% of all the deaths in worst air pollu- ing Covid-19 pandemic. According to estimate, win the best actor in the orbits with India, which translates to a apparel and food, bear a negative 50% of the final award of the night ●According to scientists, black tion are in India loss of 3.8 mn workdays overall cost. the black hole holes like this one, form when in a so-called massive stars die and their cores binary star collapse 'Captain America 4' in the works; 'The INGENUITY HELICOPTER SNAPS FIRST system named ●The black hole was given the AERIAL COLOUR IMAGE OF MARS V723 Mon nickname ‘unicorn' not only for Falcon and the Winter Soldier' writer being so rare but also because it was discovered in the constellation Malcolm Spellman penning script Monoceros, which means aptain America 4' is moving forward at the Marvel Studios, with 'The Falcon and the unicorn Winter Soldier' series writer Malcolm Spellman attached to pen the script. ●There are various CSpellman, who was the head writer and creator of the Disney+ and Marvel's se- categories of black holes. ries, will write the script with Dalan Mus- The smallest, like ‘the uni- son, a staff writer on the same show, ac- Entertainment cording to The Hollywood Reporter. corn,’ are so-called NASA'S INGENUITY MARS HELICOPTER has captured the first stellar mass black holes, ■ Chris Evans played Captain America through his Steve Rogers' colour image of the Martian surface. The Ingenuity Mars formed by the gravitational character in all the three films but at the end of the 'Avengers: Helicopter captured it with its colour camera during its second successful flight test on April 22, the US space agency said. While collapse of a single star. There Endgame', he retired and handed his shield to Anthony Mackie's capturing the image, Ingenuity was 17 feet above the surface, and are gargantuan ‘supermassive’ black holes like the one at Sam Wilson, whose story is mapped in the series, along with pitching (moving the camera's field of view upward) so the Sebastian Stan as Bucky Barnes/the Winter Soldier our galaxy’s centre, 26,000 light years from the Earth, helicopter could begin its 7-foot translation to the west, away ■ The fourth 'Captain America' is likely to continue with from the rover. The image shows a closeup of a portion of the which is four million times the sun’s mass Wilson's story, though there is no official update on the tracks the Perseverance Mars rover and Mars surface features, demonstrating the utility of scouting Martian terrain from an casting aerial perspective Devdutt Pattanaik Photo: TIMES NOW Chocolatiers ➤ The famous Cubist paint- pens new book on ing was Pablo Picasso's culture, art & in Spain response to the Nazi agen- da, which was carried out in heritage for IAS recreate Pablo the form of bombings all aspirants BOOK across Europe by their war- Picasso's planes in order to assist the oted mythologist Devdutt Pattanaik's new book for civil services aspirants fascist ruler of the country, shows how amalgamation of culture, N art and heritage have created, built 'Guernica' to General Francisco Franco, and resurrected the Indian society from its in- ception. 'Indian Culture, Art and Heritage', avail- during the Spanish Civil War able in both English and Hindi, is classified by celebrate their themes, geography and history, and aims to help ➤ Showing the tortured and students understand the logic behind culture and what it encompasses. heritage tormented human and ani- ● With more than 200 examination- mal figures, the painting based questions, the book covers many hocolatiers hailing from the Picasso. 'Euskal Gozogileak', a local as- on the 85th anniversary of the bombing depicts the plight of the important illustrations for aspirants Basque Country in Spain have sociation, made the tragic masterpiece, of the Basque town named Guernica, Basque community during ● The 496-page book, priced at ` 695, is recreated the famous paint- along with a group of chocolatiers, who ahead the Second World War. The choco- ing 'Guernica', which was cre- recreated the painting with chocolate of latiers managed to complete it with 14 the bombing presently available for sale on online and Cated by renowned artist, Pablo different colours. This will be presented separate chocolate slabs. offline stores “Discovery consists of looking at the same thing as everyone else and thinking different.” FOCUS. LEARN. MASTER -Albert Szent-Gyorgyi 02 TUESDAY, APRIL 27, 2021 “Mariners at sea, when, through cloudy weather in the day which hides the sun, or through the darkness of night, they lose knowledge of the quarter of the world to which they are sailing, touch a needle with a magnet, which will turn round till, on its CLASS: XII NCERT, CBSE motion ceasing, its point will be SUBJECT: PHYSICS TOPIC: MAGNETISM directed towards the north.” AND MATTER S Aparna Raju, Johann Carl Friedrich Gauss Teacher, DPS, (1777-1855) Bangalore East German mathematician and physicist. He Discovered Gauss Theorem in 1813 EARTH’S MAGNETISM Cause of earth's magnetic field: The mag- between the true north 1netic field is thought to arise due to electri- (geographic north) and PERSISTENT MAGNETISM cal currents produced by convective motion of magnetic north at the metallic fluids (consisting mostly of molten place. Compass needle is iron and nickel) in the outer core of the earth. used to measure D PROPERTIES AND DERIVATIONS This is known as the dynamo effect. Declination increases BASIC LAW Magnetic field intensity due to a magnetic dipole Potential Energy of with latitude. 1 (solenoid/bar magnet) along its axis. Geographic axis: is the line joining Properties of Magnetic 3 Magnetic Dipole in Magnetic field due to element dx at point P (magnetic field Earth's geographic north and south poles. Dip or Inclination I: of a place is the field lines: Magnetic Field 2 1 on axis of current carrying loop: chapter 4) angle between the i. They form 7 Magnetic axis: is the line joining the Earth's total magnetic field [BE] and its hori- continuous Earth's mag- zontal component [H ]. Dip needle measures 3 E closed loops. netic north and Dip or Inclination. ii. Tangent at a south poles. Compass needle is free to rotate in horizontal point gives The angle plane direction of between the (having vertical axis of rotation) and aligns magnetic field. geographic axis along HE whereas dip needle is free to rotate iii. Magnetic field lines do and magnetic axis in vertical plane(having horizontal axis of o not cross each other. is 11.3 . rotation) and aligns along BE. Z = B sinI; H = B cosI More field lines/ unit t = m x B E E E E Geographic Meridian [longitude]: of a tan I = Z /H (Z is the vertical component area, means stronger Torque on a = mB Sinq E E E 2 d2q place is the vertical plane passing through of earth's magnetic field) magnetic field 2 magnetic Deflecting torque is = I 4 dt2 the place and containing the Geographic axis.

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