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12 Apr 2023
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Understanding the Motor Effect: Easy Physics for Kids
Georgie
@georgiethejam
Magnetic Fields Around Coils and Particle Accelerators
This page delves deeper into magnetic fields around coils and introduces particle accelerators.
The magnetic field strength around a wire depends on several factors:
- The size of the current
- The distance from the wire
- The permeability of the space it's in
For a long straight wire, the magnetic field strength is given by:
B = μI /
Where:
- μ is the permeability of the space
- I is the current
- r is the distance from the wire
Highlight: The magnetic field is strongest at the center of a coil or solenoid.
For a solenoid, the field strength is given by:
B = μnI
Where n is the number of coils per unit length.
Example: Adding an iron core to a solenoid can significantly increase its magnetic field strength by changing the permeability.
The page also discusses forces between current-carrying wires. Wires with currents flowing in the same direction attract each other, while those with opposite currents repel.
Vocabulary: Permeability is a measure of how easily a material can be magnetized.
Finally, the page introduces three types of particle accelerators:
- Linear accelerators : These accelerate particles in a straight line using alternating potential differences.
- Cyclotrons: These use a combination of magnetic fields and alternating electric fields to accelerate particles in a spiral path.
- Synchrotrons: These are circular accelerators that use synchronized magnetic and electric fields to accelerate particles to very high energies.
Definition: Particle accelerators are machines that use electromagnetic fields to propel charged particles to high speeds and contain them in well-defined beams.
These accelerators play crucial roles in modern physics research and have applications in various fields, including medicine and materials science.
Magnetic Fields and the Motor Effect
This page covers the fundamentals of magnetic fields and introduces the motor effect in magnetic fields.
Magnetic fields, also known as B-fields, exert forces on magnetized materials. The density of field lines represents the strength of the field, with field lines never intersecting.
Highlight: Magnetic field lines always point from North to South.
When a wire carries an electric current, it induces a magnetic field perpendicular to it. The direction of this field depends on the current flow and can be determined using the right hand grip rule.
Example: To use the right hand grip rule, point your thumb in the direction of the current flow. Your curled fingers will then indicate the direction of the magnetic field lines around the wire.
The motor effect occurs when a current-carrying wire is placed in a magnetic field. The interaction between the wire's induced field and the external field creates an area of high-density field lines, resulting in a force on the wire.
Definition: The motor effect is the phenomenon where a current-carrying conductor experiences a force when placed in a magnetic field.
The force on the wire can be calculated using the formula:
F = BIL sin θ
Where:
- F is the force on the wire
- B is the magnetic field strength
- I is the current in the wire
- L is the length of wire in the magnetic field
- θ is the angle between the wire and the magnetic field
Vocabulary: Tesla is the unit of magnetic flux density or magnetic field strength.
For charged particles moving through a magnetic field, a similar formula applies:
F = Bqv sin θ
Where q is the charge of the particle and v is its velocity.
The page also introduces the Hall effect, which occurs when a current flows through a conductor in a magnetic field. This effect causes a voltage difference across the conductor, known as the Hall voltage.
Highlight: The Hall effect is used in Hall probes to measure magnetic field strength.
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.9/5
App Store
4.8/5
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
Understanding the Motor Effect: Easy Physics for Kids
Georgie
@georgiethejam
The motor effect in magnetic fields is a fundamental concept in physics, explaining how magnetic fields interact with current-carrying wires to produce force. This summary explores key aspects of understanding the motor effect in magnetic fields, including field lines,... Show more
Magnetic Fields Around Coils and Particle Accelerators
This page delves deeper into magnetic fields around coils and introduces particle accelerators.
The magnetic field strength around a wire depends on several factors:
- The size of the current
- The distance from the wire
- The permeability of the space it's in
For a long straight wire, the magnetic field strength is given by:
B = μI /
Where:
- μ is the permeability of the space
- I is the current
- r is the distance from the wire
Highlight: The magnetic field is strongest at the center of a coil or solenoid.
For a solenoid, the field strength is given by:
B = μnI
Where n is the number of coils per unit length.
Example: Adding an iron core to a solenoid can significantly increase its magnetic field strength by changing the permeability.
The page also discusses forces between current-carrying wires. Wires with currents flowing in the same direction attract each other, while those with opposite currents repel.
Vocabulary: Permeability is a measure of how easily a material can be magnetized.
Finally, the page introduces three types of particle accelerators:
- Linear accelerators : These accelerate particles in a straight line using alternating potential differences.
- Cyclotrons: These use a combination of magnetic fields and alternating electric fields to accelerate particles in a spiral path.
- Synchrotrons: These are circular accelerators that use synchronized magnetic and electric fields to accelerate particles to very high energies.
Definition: Particle accelerators are machines that use electromagnetic fields to propel charged particles to high speeds and contain them in well-defined beams.
These accelerators play crucial roles in modern physics research and have applications in various fields, including medicine and materials science.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Magnetic Fields and the Motor Effect
This page covers the fundamentals of magnetic fields and introduces the motor effect in magnetic fields.
Magnetic fields, also known as B-fields, exert forces on magnetized materials. The density of field lines represents the strength of the field, with field lines never intersecting.
Highlight: Magnetic field lines always point from North to South.
When a wire carries an electric current, it induces a magnetic field perpendicular to it. The direction of this field depends on the current flow and can be determined using the right hand grip rule.
Example: To use the right hand grip rule, point your thumb in the direction of the current flow. Your curled fingers will then indicate the direction of the magnetic field lines around the wire.
The motor effect occurs when a current-carrying wire is placed in a magnetic field. The interaction between the wire's induced field and the external field creates an area of high-density field lines, resulting in a force on the wire.
Definition: The motor effect is the phenomenon where a current-carrying conductor experiences a force when placed in a magnetic field.
The force on the wire can be calculated using the formula:
F = BIL sin θ
Where:
- F is the force on the wire
- B is the magnetic field strength
- I is the current in the wire
- L is the length of wire in the magnetic field
- θ is the angle between the wire and the magnetic field
Vocabulary: Tesla is the unit of magnetic flux density or magnetic field strength.
For charged particles moving through a magnetic field, a similar formula applies:
F = Bqv sin θ
Where q is the charge of the particle and v is its velocity.
The page also introduces the Hall effect, which occurs when a current flows through a conductor in a magnetic field. This effect causes a voltage difference across the conductor, known as the Hall voltage.
Highlight: The Hall effect is used in Hall probes to measure magnetic field strength.
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.9/5
App Store
4.8/5
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