"Magnetism Generates Electricity" Electromagnetic Phenomenon PPT Courseware 2

Description

"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 scientists were thinking: Since electric current can produce magnetism, can magnetism produce electricity?

The British physicist Faraday made many explorations in 10 years, and finally made a breakthrough in 1831, discovering that magnetism can generate electricity.

Based on this discovery, the generator was later invented, making it possible for humans to use electricity on a large scale, and humans entered the era of electrification.

1. Definition of electromagnetic induction:

When a part of a conductor in a closed circuit moves in a magnetic field and cuts the magnetic field lines, a current will be generated in the conductor. This phenomenon is called electromagnetic induction. The current produced is called induced current.

2. Conditions for generating induced current:

1. A part of a conductor in a closed circuit

2. Do the motion of cutting magnetic field lines

Explore: What factors are related to the direction of the induced current?

in conclusion:

1. The direction of the induced current is related to the direction of movement of the conductor and the direction of the magnetic field.

2. The essence of electromagnetic induction: conversion of mechanical energy into electrical energy

A quick test:

1. The conditions for generating induced current are ( )

A. A conductor moves in a magnetic field

B. The conductor moves in the magnetic field cutting the magnetic field lines.

C. A part of the conductor in the closed circuit moves to cut the magnetic field lines

D. A closed conductor moves to cut magnetic field lines in a magnetic field

2. Regarding the conditions for generating induced current, which of the following statements is correct ( )

A. Any conductor moving in a magnetic field will generate an induced current;

B. As long as the conductor moves to cut the magnetic field lines in the magnetic field, induced current can be generated in the conductor;

C. When a part of the conductor in the closed circuit moves to cut the magnetic field lines in the magnetic field, an induced current will be generated in the conductor;

D. When a part of the conductor in a closed circuit moves along the direction of the magnetic field lines in the magnetic field, an induced current will be generated in the conductor.

3. As shown in Figure 9-2, in the following situations, the pointer of the ammeter deflects ().

A. S disconnects, ab moves to the left

B． S closes, ab moves upward

C. S closes, ab moves downward

D． S closes, ab moves to the right

Class summary

1. Electromagnetic induction: When some conductors in a closed circuit move to cut magnetic field lines in a magnetic field, current is generated in the conductors. This phenomenon is called electromagnetic induction. The current generated is called induced current.

2. Conditions for generating induced current:

(1) A part of a conductor in a closed circuit

(2) Do the motion of cutting magnetic field lines

3. The direction of the induced current is related to the movement direction of the conductor and the direction of the magnetic field.

The phenomenon of electromagnetic induction converts mechanical energy into electrical energy.

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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:

"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...

"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: 2024-11-22

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

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