A Level Exam > A Level Videos > Physics A- Level > Permanent Magnets & Electromagnets
Permanent Magnets & Electromagnets Video Lecture | Physics A- Level - A Level
|
184 videos|189 docs|172 tests
|
FAQs on Permanent Magnets & Electromagnets Video Lecture - Physics A- Level - A Level
| 1. What are permanent magnets? |  |
Ans. Permanent magnets are materials that have the ability to produce their own magnetic field and retain it even when not in the presence of external magnetic fields. They are commonly made from materials such as iron, nickel, cobalt, and certain alloys.
| 2. How do permanent magnets work? | |
Ans. Permanent magnets work based on the alignment of magnetic domains within the material. These magnetic domains are groups of atoms that have their magnetic fields aligned in the same direction. When a permanent magnet is magnetized, these domains align, creating a strong magnetic field.
| 3. What are electromagnets? | |
Ans. Electromagnets are temporary magnets created by passing an electric current through a coil of wire. The magnetic field produced by the electric current in the coil magnetizes a nearby ferromagnetic material, such as iron, which then becomes magnetized.
| 4. How are electromagnets different from permanent magnets? | |
Ans. The main difference between electromagnets and permanent magnets is that electromagnets can be turned on and off by controlling the flow of electric current, while permanent magnets always produce a magnetic field. Additionally, electromagnets can have their strength adjusted by changing the amount of current flowing through the coil, whereas permanent magnets have a fixed magnetic strength.
| 5. What are some common applications of permanent magnets and electromagnets? | |
Ans. Permanent magnets are used in various applications such as electric motors, speakers, hard drives, and refrigerator magnets. Electromagnets find application in devices like doorbells, MRI machines, electric generators, and cranes, where the ability to control the magnetic field is crucial.
About this Video
|
4.67/5 Rating |
|
Nov 22, 2024 Last updated |
Video Description: Permanent Magnets & Electromagnets for A Level 2024 is part of Physics A- Level preparation.
The notes and questions for Permanent Magnets & Electromagnets have been prepared according to the A Level exam syllabus.
Information about Permanent Magnets & Electromagnets covers all important topics for A Level 2024 Exam.
Find important definitions, questions, notes, meanings, examples, exercises and tests below for Permanent Magnets & Electromagnets.
Introduction of Permanent Magnets & Electromagnets in English is available as part of our Physics A- Level for A Level & Permanent Magnets & Electromagnets in
Hindi for Physics A- Level course. Download more important topics related with notes, lectures and mock test series for
A Level Exam by signing up for free.
Description
Video Lecture & Questions for Permanent Magnets & Electromagnets Video Lecture | Physics A- Level - A Level - A Level full syllabus preparation | Free video for A Level exam to prepare for Physics A- Level.
Information about Permanent Magnets & Electromagnets
Here you can find the meaning of Permanent Magnets & Electromagnets defined & explained in the simplest way possible.
Besides explaining types of Permanent Magnets & Electromagnets theory, EduRev gives you an ample number of questions to practice Permanent Magnets & Electromagnets tests,
examples and also practice A Level tests.
|
184 videos|189 docs|172 tests
|
|
Explore Courses for A Level exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
study material
,Free
,MCQs
,Objective type Questions
,Permanent Magnets & Electromagnets Video Lecture | Physics A- Level - A Level
,practice quizzes
,Sample Paper
,Viva Questions
,video lectures
,Summary
,shortcuts and tricks
,Previous Year Questions with Solutions
,past year papers
,Important questions
,Semester Notes
,Permanent Magnets & Electromagnets Video Lecture | Physics A- Level - A Level
,ppt
,Permanent Magnets & Electromagnets Video Lecture | Physics A- Level - A Level
,mock tests for examination
,Exam
,Extra Questions
;
Study Permanent Magnets & Electromagnets on the App
Students of A Level can study Permanent Magnets & Electromagnets alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Permanent Magnets & Electromagnets,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Permanent Magnets & Electromagnets is prepared as per the latest A Level syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup