NEET > Physics Class 12 > Introduction to Earth's Magnetism
Introduction to Earth's Magnetism Video Lecture - Physics Class 12 - NEET
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FAQs on Introduction to Earth's Magnetism Video Lecture - Physics Class 12 - NEET
| 1. What is Earth's magnetism? |  |
Ans. Earth's magnetism refers to the magnetic field that surrounds the planet. It is generated by the movement of molten iron in Earth's outer core. The magnetic field extends from the interior of the Earth into space and plays a crucial role in protecting the planet from harmful solar radiation.
| 2. How is Earth's magnetic field generated? | |
Ans. Earth's magnetic field is generated by the movement of molten iron in the outer core of the planet. This movement, known as convection, creates electric currents that, in turn, generate the magnetic field. This process is called the geodynamo.
| 3. What are the effects of Earth's magnetic field on our daily lives? | |
Ans. Earth's magnetic field has several effects on our daily lives. It acts as a compass, helping us navigate and find directions. It also plays a vital role in the protection of our atmosphere by deflecting harmful solar winds and radiation. Additionally, it aids in the migration patterns of animals such as birds and sea turtles, who use the magnetic field for navigation.
| 4. Can Earth's magnetic field change over time? | |
Ans. Yes, Earth's magnetic field can change over time. In fact, it has been observed that the magnetic field has undergone reversals in the past, where the magnetic north and south poles switch places. These reversals, known as geomagnetic reversals, occur over long periods of time and are a natural part of the Earth's magnetic cycle.
| 5. How do scientists study Earth's magnetic field? | |
Ans. Scientists study Earth's magnetic field using various instruments and techniques. One common method is to use magnetometers, which are devices that measure the strength and direction of the magnetic field. Researchers also analyze the magnetic properties of rocks and minerals to understand past changes in the magnetic field. Additionally, satellites equipped with magnetometers provide valuable data on the Earth's magnetic field from space.
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