"Oersted's Discovery" Electromagnet and Automatic Control PPT Courseware 3

Description

"Oersted's Discovery" Electromagnet and Automatic Control PPT Courseware 3

Oersted experiment

in conclusion:

1. There is a magnetic field around the energized wire;

2. 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

Oersted's experiment showed:

1. There is a magnetic field around the energized wire (ie: the magnetic effect of the current)

2. The direction of the magnetic field of the current is related to the direction of the current

Magnetic field of energized solenoid

1. There is a magnetic field around the energized solenoid

2. The distribution of magnetic field lines around an energized solenoid is very similar to that of a bar magnet

3. The polarity of the energized solenoid is related to the direction of the current.

right-hand spiral rule

Hold the solenoid with your right hand and bend your four fingers in the same direction as the current in the solenoid. The end pointed by your thumb is the N pole of the solenoid.

1. Hold the solenoid with your right hand and bend your four fingers in the direction of the solenoid current. The end pointed by your thumb is the north (N) pole of the solenoid.

2. Method and sequence of using right-handed spiral:

(1) Check the winding direction of the solenoid;

(2) Mark the direction of current in the solenoid;

(3) Use the right-hand screw to determine the magnetic pole direction of the solenoid

Class exercises

1. Oersted’s experiment shows that ________ exists ____; it also shows that the direction of ________ is related to the direction of ________.

The polarity of both ends of the energized solenoid is related to the ________ direction. It can be judged by ________.

2. Mark the N and S poles of the energized solenoid in the figure below.

3. According to the direction of the small magnetic needle when it is at rest, indicate the direction of the current in the solenoid on the diagram.

4. As shown in the figure, mark the N and S poles of the energized solenoid and the small magnetic needle respectively.

5. According to the deflection of the small magnetic needle, mark the direction of the current in the solenoid.

6. The methods to magnetize a steel rod are:

(1) Rub the magnet on the steel rod.

(2) Put it into an energized (DC) solenoid.

Class summary

1. Oersted’s experiment showed that, like a magnet, a current-carrying conductor also has a magnetic field around it.

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 __________, and the relationship between them can be determined by ____________.

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"Oersted's Discovery" Electromagnet and Automatic Control PPT Courseware 2:

"Oersted's Discovery" Electromagnets and Automatic Control PPT Courseware 2 Similarities between Electric Phenomenon and Magnetism Phenomenon Electric Phenomenon Charged bodies can attract ________. There are ___ charges and ____ charges in nature. Like charges ____ each other, and dissimilar charges ____ each other. Magnetic phenomena ..

"Oersted's Discovery" Electromagnets and Automatic Control PPT courseware:

"Oersted's Discovery" Electromagnets and Automatic Control PPT Courseware Reviewing the Past and Learning the New 1. There is a _______ magnetic field around the magnet, which is an objectively existing ______ magnetic field. When a small magnetic needle is placed at one point and comes to rest, its ____ pole points to The direction of is the direction of the magnetic field at that point. 2,..

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Update Time: 2024-10-03

This template belongs to Physics courseware Guangdong and Shanghai Edition Ninth Grade Physics Volume 2 industry PPT template

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