# Magnetism and Electromagnetism

Watch
Announcements
#1
Hi! In my physics class we are now studying the Magnetism and Electromagnetism and we have to finish the booklet that our teacher gave to us and hand it back to her. We are actually rushing this lesson so I am a bit confused to some parts. (This will be long)

1. Like magnetic poles NORTH & NORTH or SOUTH & SOUTH. Dissimilar poles NORTH & SOUTH. Magnets also ATTRACT some metallic objects.

2. Magnetic force are strong over long or short distances. SHORT

3. Magnetic force is the distribution of the magnetic force in the region of a magnet.
Write a similar statement for gravitational fields. GRAVITATIONAL FIELDS HAVE A POINT OF SOURCE AND EXERT FORCE FROM A DISTANCE WITH NO CONTACT.

4. What is the difference between objects that exert gravitational forces and objects that exert magnetic forces.
IN GRAVITATIONAL FORCES, THEY ONLY GO ON CENTER. WHILE IN MAGNETIC FORCES THEY GO ON LOOPS.

5. Are object that exert gravitational force dipoles? How do you know?
NO, (i am not sure how to explain it)

6. Name one thing you could do to make a permanent magnet lose its magnetic properties.
HEAT IT UP, BECAUSE THIS WILL MAKE THE ELECTRONS MOVE TO DIFFERENT DIRECTIONS, WHICH WILL UNMAGNETIZED IT.

7. If you were to make a model Earth with a magnetic field you would place the _______ end of the magnet would you place at the north geographic pole? Why?
(Again not sure)

8. The ELECTRIC CURRENT inside the Earth is thought to cause the Earth’s magnetic field.

9. The strip on the back of your credit card stores information as a ______ of ________ strength.

10. What is the shape of magnetic field inside the jaws of a horseshoe magnet?
LOOP

11. a) What happened to the suspended magnet when the current is reversed?
POINTS TO THE OPPOSITE DIRECTION.
b) What does it tell you about electric current and magnetism?
WHEN ELECTRIC CURRENT CHANGES ITS DIRECTION THE MAGNETIC FORCE ALSO CHANGES ITS DIRECTION.
c) What must be going on in the permanent magnets to have a magnetic field? MAGNETIC DOMAIN
d) How is it possible. What you know about the atoms here?

12. _____ electrons cause a substance ti have _____ properties

13. What is the shape of magnetic field line? LOOP
14. What is the shape of the magnetic field around a straight conductor? CONCENTRIC CIRCLES

0
3 years ago
#2
(Original post by MMarìc)
Hi! In my physics class we are now studying the Magnetism and Electromagnetism and we have to finish the booklet that our teacher gave to us and hand it back to her. We are actually rushing this lesson so I am a bit confused to some parts. (This will be long)

1. Like magnetic poles NORTH & NORTH or SOUTH & SOUTH. Dissimilar poles NORTH & SOUTH. Magnets also ATTRACT some metallic objects.

2. Magnetic force are strong over long or short distances. SHORT

3. Magnetic force is the distribution of the magnetic force in the region of a magnet.
Write a similar statement for gravitational fields. GRAVITATIONAL FIELDS HAVE A POINT OF SOURCE AND EXERT FORCE FROM A DISTANCE WITH NO CONTACT.

4. What is the difference between objects that exert gravitational forces and objects that exert magnetic forces.
IN GRAVITATIONAL FORCES, THEY ONLY GO ON CENTER. WHILE IN MAGNETIC FORCES THEY GO ON LOOPS.

5. Are object that exert gravitational force dipoles? How do you know?
NO, (i am not sure how to explain it)

6. Name one thing you could do to make a permanent magnet lose its magnetic properties.
HEAT IT UP, BECAUSE THIS WILL MAKE THE ELECTRONS MOVE TO DIFFERENT DIRECTIONS, WHICH WILL UNMAGNETIZED IT.

7. If you were to make a model Earth with a magnetic field you would place the _______ end of the magnet would you place at the north geographic pole? Why?
(Again not sure)

8. The ELECTRIC CURRENT inside the Earth is thought to cause the Earth’s magnetic field.

9. The strip on the back of your credit card stores information as a ______ of ________ strength.

10. What is the shape of magnetic field inside the jaws of a horseshoe magnet?
LOOP

11. a) What happened to the suspended magnet when the current is reversed?
POINTS TO THE OPPOSITE DIRECTION.
b) What does it tell you about electric current and magnetism?
WHEN ELECTRIC CURRENT CHANGES ITS DIRECTION THE MAGNETIC FORCE ALSO CHANGES ITS DIRECTION.
c) What must be going on in the permanent magnets to have a magnetic field? MAGNETIC DOMAIN
d) How is it possible. What you know about the atoms here?

12. _____ electrons cause a substance ti have _____ properties

13. What is the shape of magnetic field line? LOOP
14. What is the shape of the magnetic field around a straight conductor? CONCENTRIC CIRCLES

3. Magnetic force is the distribution of the magnetic force in the region of a magnet.
Write a similar statement for gravitational fields. GRAVITATIONAL FIELDS HAVE A POINT OF SOURCE AND EXERT FORCE FROM A DISTANCE WITH NO CONTACT.
(Can you check the question again - Magnetic force is the distribution of the magnetic force in the region of a magnet. I think you should connect gravitational fields with gravitational force and mass)

4. What is the difference between objects that exert gravitational forces and objects that exert magnetic forces.
IN GRAVITATIONAL FORCES, THEY ONLY GO ON CENTER. WHILE IN MAGNETIC FORCES THEY GO ON LOOPS.
(It seems that you are talking about gravitational field and magnetic field instead of gravitational force and magnetic force)

5. Are object that exert gravitational force dipoles? How do you know?
NO, (i am not sure how to explain it)
(Do you know what is dipoles? Does mass have positive and negative mass?)

7. If you were to make a model Earth with a magnetic field you would place the _______ end of the magnet would you place at the north geographic pole? Why?
(Again not sure)
(The sentence does not seem to be right. Can you check it again)

8. The ELECTRIC CURRENT inside the Earth is thought to cause the Earth’s magnetic field.
(I don’t really agree with the answer. Sound a bit strange (to me). See page 591 of Pearson Physics)
Just for your reference: On Earth, magnetism is most probably caused by moving charges in the molten layer just below Earth’s crust. (this is the suggested for 12.1 Check and Reflect Question 4(b))

9. The strip on the back of your credit card stores information as a ______ of ________ strength.
(Not sure what your teacher expects)
https://van.physics.illinois.edu/qa/listing.php?id=381

10. What is the shape of magnetic field inside the jaws of a horseshoe magnet?
LOOP
(Drawing the “shape” of the magnetic field makes more sense than to describe the “shape”)

11. a) What happened to the suspended magnet when the current is reversed?
POINTS TO THE OPPOSITE DIRECTION.
(Agree)

b) What does it tell you about electric current and magnetism?
WHEN ELECTRIC CURRENT CHANGES ITS DIRECTION THE MAGNETIC FORCE ALSO CHANGES ITS DIRECTION.
(Don’t really know what your teacher wants.)

c) What must be going on in the permanent magnets to have a magnetic field? MAGNETIC DOMAIN
(Don’t really know what your teacher wants.)
Just for your reference: In a bar magnet, magnetism is caused by moving charges within the atoms. (this is the suggested for 12.1 Check and Reflect Question 4(a))

d) How is it possible. What you know about the atoms here?
(Don’t really know what your teacher wants.)

12. _____ electrons cause a substance ti have _____ properties
(Don’t really know what your teacher wants.)
https://www.quora.com/What-exactly-causes-magnetic-properties-on-materials

13. What is the shape of magnetic field line? LOOP
(Shape? Don’t really know what your teacher wants.)
A proposed answer: Magnetic field lines are continuous, forming closed loops without a beginning or end. They are directed from the north pole to the south pole.)

There are some comments in regard to the questions in the curve brackets. Suggested answers or references are in a different colour.
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### Feeling behind at school/college? What is the best thing your teachers could to help you catch up?

Extra compulsory independent learning activities (eg, homework tasks) (23)
8.49%
Run extra compulsory lessons or workshops (38)
14.02%
Focus on making the normal lesson time with them as high quality as possible (46)
16.97%
Focus on making the normal learning resources as high quality/accessible as possible (38)
14.02%
Provide extra optional activities, lessons and/or workshops (79)
29.15%
Assess students, decide who needs extra support and focus on these students (47)
17.34%