"Magnetism Generates Electricity" Electricity and Magnetism PPT Courseware 3

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"Magnetism Generates Electricity" Electricity and Magnetism PPT Courseware 3

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Redo Oersted’s experiment and think:

(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?

What experimental equipment should be chosen for this experiment? Why?

think:

(1) How to obtain the magnetic field?

(2) What are the conditions for current in the circuit?

(3) How to show whether there is current in the circuit?

Electromagnetic induction

When a part of a conductor in a closed circuit moves to cut the magnetic field lines in a magnetic field, a current is generated in the conductor, which is an electromagnetic induction phenomenon.

Induced current

direction of induced current

The size of the induced current

Structure of hand generator

Watch the light bulb glow as the coil rotates

Connect two light-emitting diodes in parallel with opposite polarities, connect them to the original light bulb, and conduct the experiment. Observe the light emission of the diode.

alternating current

(1) What is the difference between alternating current and direct current?

(2) Compare the differences between using batteries to power light bulbs and hand-operated generators to power light bulbs.

Class summary

1. What did you learn from this lesson?

2. The conditions under which induced current occurs.

3. How does a generator generate electricity?

4. The difference between alternating current and direct current.

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The picture below is a simplified diagram of a microphone, explaining how it converts sound signals into electrical signals.

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

"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" Electromagnetic Phenomenon PPT Courseware:

"Magnetism Generates Electricity" Electromagnetic Phenomenon PPT Courseware 1. Exploration of Magnetism Generating Electricity 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...

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Update Time: 2024-11-25

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

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