"Magnetic Phenomenon" Electromagnetic Phenomenon PPT Courseware

Description

"Magnetic Phenomenon" Electromagnetic Phenomenon PPT Courseware

1. Magnetism and magnets

Magnets can attract iron, cobalt, nickel and other substances. This property of magnets is called magnetism.

Magnetic substances are called magnets.

2. Properties of magnets

1. Iron attraction: Magnets can only attract iron, cobalt, nickel and other substances

2. The magnetic strength of each part of the magnet is different. The strongest magnetic part of the magnet is called the magnetic pole.

3. Directivity: For a magnet that can rotate freely, the direction of the magnetic pole is determined when it is stationary.

3. The law of interaction between magnetic poles:

Magnetic poles with the same name repel each other and poles with different names attract each other.

4. Magnetization

1. Some objects that were originally non-magnetic acquire magnetism. This phenomenon is called magnetization;

2. Magnetization method:

By rubbing an object against a magnet in one direction, the object becomes a magnet.

Putting an object close to a magnet can also turn the object into a magnet.

5. Application of magnets

Magnets are widely used in daily life and are inseparable from industrial and agricultural production.

Method 1: Judge based on the iron-attracting properties of the magnet. If a bar-shaped iron block can attract iron powder, it means it is magnetic and is a magnet.

Method 2: Judge based on the directivity of the magnet. Tie the bar-shaped iron block in the middle with a thin wire and hang it up. If it were magnetic, it would stop in the north-south direction. If the piece of iron were not magnetic, it would stop in any direction.

Method 3: Judge based on the interaction between magnetic poles. Take another bar magnet and place its two ends close to one end of the bar magnet. If it attracts twice, it means it is non-magnetic; if it attracts once and repels once, it means it is magnetic.

think about it

There are two steel rods A and B with the same shape. One is magnetic and the other is not. Without any other tools, how do you know which one is magnetic and which one is not?

Keywords: electromagnetic phenomenon teaching courseware, magnetic phenomenon teaching courseware, Lujiao version ninth grade physics PPT courseware download, second volume, ninth grade physics slide courseware download, electromagnetic phenomenon PPT courseware download, magnetic phenomenon PPT courseware download, .PPT format;

For more information about the "Electromagnetic Phenomenon and Magnetic Phenomenon" PPT courseware, please click on the "Electromagnetic Phenomenon ppt Magnetic Phenomenon ppt" tab.

"Generator" Electromagnetic Phenomenon PPT Courseware 2:

"Generator" Electromagnetic Phenomenon PPT Courseware 2 Generator 1. The principle of a generator is: electromagnetic induction phenomenon 2. The essence of a generator is: converting mechanical energy into electrical energy. The basic structure of a generator. A generator consists of a stator and a rotor. 1. Direction The changing current is called...

"Generator" electromagnetic phenomena PPT courseware:

"Generator" electromagnetic phenomenon PPT courseware [Principle] Electromagnetic induction phenomenon (conversion of mechanical energy into electrical energy) [Alternating current] A current that changes direction periodically is called alternating current. Period (T): The time it takes for the coil to rotate once (s) Frequency (f): The coil rotates per second..

"Magnetism Generates Electricity" Electromagnetic Phenomenon PPT Courseware 2:

"Magnetism Generates Electricity" Electromagnetic Phenomenon PPT Courseware 2 Knowledge Review 1. What is the name of this experiment? 2. Who was the first to complete this experiment? Which country? In what year was it completed? 3. What did this experiment confirm? After Oersted discovered the magnetic effect of electric current, many...

File Info

Update Time: 2024-06-29

This template belongs to Physics courseware Lu Jiao Edition Ninth Grade Physics Volume 2 industry PPT template

Preview