Year 11 Exam > Year 11 Videos > Physics for GCSE/IGCSE > Magnetic Fields
Magnetic Fields Video Lecture | Physics for GCSE/IGCSE - Year 11
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127 videos|148 docs|35 tests
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FAQs on Magnetic Fields Video Lecture - Physics for GCSE/IGCSE - Year 11
| 1. What is a magnetic field? |  |
Ans. A magnetic field is a region surrounding a magnet where magnetic forces are experienced. It is produced by moving electric charges and is characterized by the direction of the force it exerts on other magnetic materials.
| 2. How is a magnetic field formed? | |
Ans. A magnetic field is formed when electric charges move. In a permanent magnet, the electrons orbiting the atoms all align in the same direction, creating a magnetic field. In electromagnets, passing an electric current through a wire generates a magnetic field.
| 3. How does a magnetic field affect nearby objects? | |
Ans. A magnetic field can exert forces on nearby objects made of magnetic materials, such as iron. These objects will be attracted or repelled depending on the orientation of the magnetic field and the object.
| 4. What are the applications of magnetic fields in everyday life? | |
Ans. Magnetic fields are used in various technologies, such as generators, motors, and transformers. They are also used in magnetic resonance imaging (MRI) machines in medicine and in magnetic compasses for navigation.
| 5. How can the strength of a magnetic field be increased or decreased? | |
Ans. The strength of a magnetic field can be increased by increasing the current in an electromagnet or by adding more coils to the wire. It can be decreased by moving the magnet farther away from the object or by reducing the current flow.
About this Video
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Dec 31, 2024 Last updated |
Video Description: Magnetic Fields for Year 11 2024 is part of Physics for GCSE/IGCSE preparation.
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