"Magnetism Generates Electricity" Electromagnetic Phenomenon PPT Courseware

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"Magnetism Generates Electricity" Electromagnetic Phenomenon PPT Courseware

1. Exploration of magnetoelectricity

After Oersted discovered that electricity generates magnetism, scientists further discovered the effect of magnetism on electricity and invented an electric motor that can convert electrical energy into mechanical energy. People were asked to reflect: Can electricity and magnetism be converted into each other? Since electrical energy produces magnetism, can magnetic energy produce current in turn? Can mechanical energy also be converted into electrical energy?

2. Electromagnetic induction phenomenon

Explore the conditions and characteristics of induced current

think

1. How can a closed wire move in a magnetic field to generate current?

2. What is the relationship between the direction of the induced current and the direction of motion and magnetic field?

3. What factors are related to the size of the induced current?

4. Is there energy conversion in electromagnetic induction?

[Condition] When a part of a conductor in a closed circuit moves in a magnetic field to cut the magnetic field lines, a current will be generated in the conductor.

① "Closed circuit" means that the circuit cannot be opened, that is, the various components that make up the circuit are connected to form a current path. If the circuit is not closed, it cannot form a path for the directional movement of charges, and there will be no current in the circuit.

② "Part of the conductor" is not the entire circuit, but is equivalent to the power supply in a closed circuit.

③ "Doing the motion of cutting the magnetic field lines" means cutting the magnetic field lines. Then the direction of movement of the conductor must be at a certain angle with the magnetic field lines, rather than parallel to the magnetic field lines.

④ "When" means that the induced current only occurs during the process of cutting magnetic field lines.

[Size] Explore the factors that affect the size of the induced current?

1. Factors: (magnetic field strength) (cutting speed)

2. Conclusion:

1. When the cutting speed is the same, the magnetic field is strong and the current is large.

2. When the magnetic field strength is the same, cutting is fast and the current is large.

【Application direction】

Realizes the conversion of mechanical energy into electrical energy.

[Thinking] What important tools have scientists invented using this phenomenon?

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For more information about the PPT courseware "Electromagnetic Phenomenon of Magnetism", please click the "Electromagnetic Phenomenon of Magnetism ppt" ppt tag.

"Magnetism Generates Electricity" PPT:

"Magnetic Electricity" PPT Part One Content: Introduction of New Lesson After 10 years of research, the British scientist Faraday discovered the conditions and laws of magnetic electricity in 1831, and realized his desire to use magnetic fields to obtain electric current (magnetic electricity). Significance: Leading to the mass production of electrical energy..

"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...

"Magnetism Generates Electricity" Electricity and Magnetism PPT Courseware 3:

"Magnetism Generates Electricity" Electricity and Magnetism PPT Courseware 3 Review Review Redo Oersted's experiment and think about: (1) What did Oersted's experiment illustrate? (2) Electricity generates magnetism, so can magnetism generate electricity? Have you ever seen such an instance? Under what circumstances does magnetic energy generate electricity? This experiment should choose...

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Update Time: 2024-09-08

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

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