"Electric Magnetism" Electricity and Magnetism PPT Courseware 4

Description

"Electric Magnetism" Electricity and Magnetism PPT Courseware 4

think:

We have learned about magnets and charged bodies, so what are the similar properties between magnets and charged bodies?

1. Charged objects have the property of attracting light and small objects, and magnets can attract steel-like substances.

2. Charged objects are divided into positive and negative charges, and magnets are divided into N and S poles.

3. Similar charges repel each other, and different charges attract each other. Magnetic poles with the same name repel each other and poles with different names attract each other.

Are these similarities a coincidence, or is there some connection between electricity and magnetism?

learning target

1. Understand the magnetic effect of electric current, and initially understand that there is a certain connection between electricity and magnetism.

2. Know that there is a magnetic field around a current-carrying conductor. The magnetic field of a current-carrying solenoid is similar to that of a bar magnet.

3. Be able to use Ampere's rule to determine the polarity at both ends of an energized solenoid or the direction of current in an energized solenoid.

4. Go through the process of exploring the direction of the external magnetic field of the energized solenoid.

(1) Will the magnetic needle rotate?

As shown in the picture on the right, place a magnetic needle under a straight wire, make the wire contact the battery, connect the circuit, and observe the changes of the small magnetic needle.

(2) There is no other object in direct contact with the magnetic needle, so what material can cause the small magnetic needle to be affected by force? What does the rotation of the magnetic needle mean?

is the magnetic field, describing the magnetic field around a current-carrying wire. That is, there is a magnetic field around the current.

This magnetic field is in a different direction than the earth's magnetic field, so the magnetic needle rotates.

1. Magnetic effect of electric current

Oersted's experiment description:

There is a magnetic field around the current, and the direction of the magnetic field of the current is related to the direction of the current.

This phenomenon is called the magnetic effect of electric current.

2. Magnetic field of energized solenoid

1. There are ________ around the energized solenoid.

2. The distribution of iron filings around the energized solenoid is similar to __________. Therefore, the magnetic field around it is _______ with that of the bar magnet. The two ends of the energized solenoid are equivalent to the _________ of the bar magnet.

3. The polarity of the two ends of the energized solenoid is related to the direction of _______ in the solenoid.

Class summary

1. Oersted’s experiment showed that: ________________________________________

2. There are ______ around the energized solenoid,

The distribution of magnetic field lines around an energized solenoid is very similar to that of __________.

The polarity of the energized solenoid is related to___________,

The relationship between them can be determined by ______________.

practise

10. As shown in the figure, a small magnetic needle is placed in the solenoid. When the switch S is closed, the N pole of the small magnetic needle points to ( )

A. Do not move

B． Turn outward 90°

C. Turn 90° inward

D. Rotate 180°

11. In 1820, Ampère conducted a small experiment at a regular meeting of the Academy of Sciences, which aroused the interest of scientists. As shown in the picture below, the solenoid was hung horizontally in the east-west direction, and then the wire was energized. Please think about what will happen. ( )

A. The energized solenoid remains stationary in its original position.

B. The energized solenoid rotates until A points to the direction and B points to the north.

C. The energized solenoid rotates until A points to north and B points to direction.

D. The energized solenoid is at rest at any position.

12. A student uses the device shown in the picture below to study the connection between electricity and magnetism. Please carefully observe the device\operation and phenomenon in the picture, and then draw a preliminary conclusion.

Comparing pictures A and B, we can see that: _______________

Comparing pictures B and C, we can see that: _______________

Keywords: electricity and magnetism teaching courseware, electrogenerated magnetism teaching courseware, New People's Education Edition ninth grade physics PPT courseware, ninth grade physics slide courseware download, electricity and magnetism PPT courseware download, electrogenerated magnetism PPT courseware download, .ppt format

For more information about the PPT courseware "Electric Magnetism, Electricity and Magnetism", please click on the Electricity and Magnetism ppt tab.

"Electric Magnetism" PPT:

"Electric Magnetism" PPT Part One Content: Oersted's Experiment In 1820, Danish physicist Oersted finally experimentally confirmed the existence of a magnetic field around an energized conductor. This major discovery shocked the scientific community and brought electromagnetism into a new era. period of development. The magnetic field of the current...

"Electric Magnetism" Electromagnetic Phenomenon PPT Courseware 3:

"Electric Magnetism" Electromagnetic Phenomenon PPT Courseware 3 Conjecture: The connection between electricity and magnetism. What are the similarities between charged bodies and magnets? A charged object has two kinds of charges, and a magnet has two magnetic poles. The same kind (same name) repels each other, and different kinds (different names) attract each other. Demo 1 (1)..

"Electric Magnetism" Electromagnetic Phenomenon PPT Courseware 2:

"Electric Magnetism" Electromagnetic Phenomenon PPT Courseware 2 Practice 1. An iron block is hung under the spring dynamometer. When the spring dynamometer is moved from N to S, the indication of the spring dynamometer changes with the position. The image is 2． There are two rods a and b with the same shape. If it is as shown in Figure A...

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Update Time: 2024-11-22

This template belongs to Physics courseware People's Education Edition Ninth Grade Physics Complete Book industry PPT template

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