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This transcript covers magnetism and electromagnetism, focusing on temporary and... Show more
This page delves deeper into practical applications of electromagnetism, focusing on electric motors, loudspeakers, and the principle of electromagnetic induction.
Electric motors, specifically DC motors, are explained in detail. They consist of a coil of wire placed between two permanent magnets. When direct current flows through the wire, it experiences a force due to the motor effect, causing rotation.
Highlight: The speed of an electric motor can be increased by increasing the current, strengthening the magnet, or adding more turns to the coil.
The page then discusses loudspeakers, which utilize electromagnetic principles to produce sound. A loudspeaker consists of a coil attached to a cone within a magnetic field. When an alternating current flows through the coil, it causes the cone to vibrate, producing sound waves.
Example: In a loudspeaker, the vibration of the cone pushes air molecules, creating sound waves that we hear.
Electromagnetic induction is introduced as the phenomenon where a voltage is induced in a conductor or coil when it moves through a magnetic field or when a magnetic field changes around it. This principle is crucial for understanding generators and transformers.
Definition: The generator effect occurs when relative movement between a conductor and a magnetic field induces a voltage in the conductor.
The page concludes by explaining how to induce more voltage in electromagnetic induction, which is essential for optimizing the efficiency of generators and other electromagnetic devices.
Vocabulary: Relative movement in electromagnetic induction refers to the motion between the conductor and the magnetic field, which is necessary to induce a voltage.
This page introduces the core concepts of magnetism and electromagnetism, focusing on the differences between temporary and permanent magnetism and their practical applications.
Magnetic materials are classified based on their ability to retain magnetism. Temporary magnet examples include soft materials like iron, which lose their magnetism when the magnetic field is removed. In contrast, permanent magnet examples are made of hard materials like steel, which retain their magnetism.
Definition: Non-magnetic materials are substances that are not attracted to magnets and cannot be magnetized.
The page explains magnetic field lines, which represent the magnetic force on a north pole at any given point. The direction of these lines indicates the force direction, while their proximity shows the force magnitude.
Highlight: Magnetic field lines always go from north to south poles and never overlap.
Electromagnetism is introduced as the phenomenon where an electric current passing through a conductor produces a magnetic field. The right-hand grip rule is explained as a method to determine the direction of the magnetic field produced by a current-carrying wire.
Example: In the right-hand grip rule, the thumb points in the direction of the current, while the fingers wrap around to show the direction of the field.
The page also covers electromagnets, which consist of a coil of wire wrapped around a magnetically soft core, usually iron. These can be turned on and off and are also known as solenoids.
Vocabulary: Solenoids are coils of wire that produce a magnetic field when an electric current passes through them.
The motor effect is described as the force experienced by a current-carrying conductor in a magnetic field. This principle is fundamental to the operation of electric motors.
App Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
This transcript covers magnetism and electromagnetism, focusing on temporary and permanent magnets, magnetic fields, electromagnets, and applications like electric motors and loudspeakers. It explains key concepts, principles, and practical applications in physics.
Overall Summary:
The document provides a comprehensive overview... Show more
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This page delves deeper into practical applications of electromagnetism, focusing on electric motors, loudspeakers, and the principle of electromagnetic induction.
Electric motors, specifically DC motors, are explained in detail. They consist of a coil of wire placed between two permanent magnets. When direct current flows through the wire, it experiences a force due to the motor effect, causing rotation.
Highlight: The speed of an electric motor can be increased by increasing the current, strengthening the magnet, or adding more turns to the coil.
The page then discusses loudspeakers, which utilize electromagnetic principles to produce sound. A loudspeaker consists of a coil attached to a cone within a magnetic field. When an alternating current flows through the coil, it causes the cone to vibrate, producing sound waves.
Example: In a loudspeaker, the vibration of the cone pushes air molecules, creating sound waves that we hear.
Electromagnetic induction is introduced as the phenomenon where a voltage is induced in a conductor or coil when it moves through a magnetic field or when a magnetic field changes around it. This principle is crucial for understanding generators and transformers.
Definition: The generator effect occurs when relative movement between a conductor and a magnetic field induces a voltage in the conductor.
The page concludes by explaining how to induce more voltage in electromagnetic induction, which is essential for optimizing the efficiency of generators and other electromagnetic devices.
Vocabulary: Relative movement in electromagnetic induction refers to the motion between the conductor and the magnetic field, which is necessary to induce a voltage.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page introduces the core concepts of magnetism and electromagnetism, focusing on the differences between temporary and permanent magnetism and their practical applications.
Magnetic materials are classified based on their ability to retain magnetism. Temporary magnet examples include soft materials like iron, which lose their magnetism when the magnetic field is removed. In contrast, permanent magnet examples are made of hard materials like steel, which retain their magnetism.
Definition: Non-magnetic materials are substances that are not attracted to magnets and cannot be magnetized.
The page explains magnetic field lines, which represent the magnetic force on a north pole at any given point. The direction of these lines indicates the force direction, while their proximity shows the force magnitude.
Highlight: Magnetic field lines always go from north to south poles and never overlap.
Electromagnetism is introduced as the phenomenon where an electric current passing through a conductor produces a magnetic field. The right-hand grip rule is explained as a method to determine the direction of the magnetic field produced by a current-carrying wire.
Example: In the right-hand grip rule, the thumb points in the direction of the current, while the fingers wrap around to show the direction of the field.
The page also covers electromagnets, which consist of a coil of wire wrapped around a magnetically soft core, usually iron. These can be turned on and off and are also known as solenoids.
Vocabulary: Solenoids are coils of wire that produce a magnetic field when an electric current passes through them.
The motor effect is described as the force experienced by a current-carrying conductor in a magnetic field. This principle is fundamental to the operation of electric motors.
App Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
