Magnitude of magnetic field due to a circular loop carrying current at its centre is B. If radius and current flowing through the loop are doubled,then new magnetic field at the centre will be A. B/2 B. 2B C. B D. 4B ? The answer is D plz explain.?

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Magnitude of magnetic field due to a circular loop carrying current at its centre is B. If radius and current flowing through the loop are doubled,then new magnetic field at the centre will be A. B/2 B. 2B C. B D. 4B ? The answer is D plz explain.?

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Read the following text and answer the following questions on the basis of the same:Earth’s magnetism: Earth’s magnetic field is caused by a dynamo effect. The effect works in the same way as a dynamo light on a bicycle. Magnets in the dynamo start spinning when the bicycle is pedaled, creating an electric current. The electricity is then used to turn on the light. This process also works in reverse. If you have a rotating electric current, it will create a magnetic field. On Earth, flowing liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet. The average magnetic field strength in the Earth's outer core was measured to be 25 Gauss, 50 times stronger than the magnetic field at the surface. The magnetic field is extremely important for sustaining life on Earth. Without it, we would be exposed to high amounts of radiation from the Sun and our atmosphere would be free to leak into space. This is likely what happened to the atmosphere on Mars. As Mars doesn’t have flowing liquid metal in its core, it doesn’t produce the same dynamo effect. This left the planet with a very weak magnetic field, allowing for its atmosphere to be stripped away by solar winds, leaving it uninhabitable. Based upon the study of lava flows throughout the world, it has been proposed that the Earth's magnetic field reverses at an average interval of approximately 300,000 years. However, the last such event occurred some 780,000 years ago.Which of the followings is the reason for Earth’s magnetism?

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Eddy currents are produced when [1988]

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Read the following text and answer the following questions on the basis of the same:Super magnet The term super magnet is a broad term and encompasses several families of rare-earth magnets that include seventeen elements in the periodic table; namely scandium, yttrium, and the fifteen lanthanides. These elements can be magnetized, but have Curie temperatures below room temperature. This means that in their pure form, their magnetism only appears at low temperatures. However, when they form compounds with transition metals such as iron, nickel, cobalt, etc. Curie temperature rises well above room temperature and they can be used effectively at higher temperatures as well. The main advantage they have over conventional magnets is that their greater strength allows for smaller, lighter magnets to be used. Super magnets are of two categories:(i) Neodymium magnet: These are made from an alloy of neodymium, iron, and boron. This material is currently the strongest known type of permanent magnet. It is typically used in the construction of head actuators in computer hard drives and has many electronic applications, such as electric motors, appliances, and magnetic resonance imaging (MRI).(ii) Samarium-cobalt magnet: These are made from an alloy of samarium and cobalt. This second strongest type of rare Earth magnet is also used in electronic motors, turbo-machinery, and because of its high temperature range tolerance may also have many applications for space travel, such as cryogenics and heat resistant machinery. Rare-earth magnets are extremely brittle and also vulnerable to corrosion, so they are usually plated or coated to protect them from breaking, chipping, or crumbling into powder. Since super magnets are about 10 times stronger than ordinary magnets, safe distance should be maintained otherwise these may damage mechanical watch, CRT monitor, pacemaker, credit cards, magnetically stored media etc. These types of magnets are hazardous for health also. The greater force exerted by rare-earth magnets creates hazards that are not seen with other types of magnet. Magnets larger than a few centimeters are strong enough to cause injuries to body parts pinched between two magnets or a magnet and a metal surface, even causing broken bones. Neodymium permanent magnets lose their magnetism 5% every 100 years. So, in the truest sense Neodymium magnets may be considered as a permanent magnet.Neodymium and Samarium are

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Two identical coils carrying equal current have a common centre, and their planes are at right angles to each other. Find the ratio of the magnitude of the resultant magnetic field at centre and the field due to one coil alone

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Magnitude of magnetic field due to a circular loop carrying current at its centre is B. If radius and current flowing through the loop are doubled,then new magnetic field at the centre will be A. B/2 B. 2B C. B D. 4B ? The answer is D plz explain.? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Magnitude of magnetic field due to a circular loop carrying current at its centre is B. If radius and current flowing through the loop are doubled,then new magnetic field at the centre will be A. B/2 B. 2B C. B D. 4B ? The answer is D plz explain.? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Magnitude of magnetic field due to a circular loop carrying current at its centre is B. If radius and current flowing through the loop are doubled,then new magnetic field at the centre will be A. B/2 B. 2B C. B D. 4B ? The answer is D plz explain.?.

Solutions for Magnitude of magnetic field due to a circular loop carrying current at its centre is B. If radius and current flowing through the loop are doubled,then new magnetic field at the centre will be A. B/2 B. 2B C. B D. 4B ? The answer is D plz explain.? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.

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