"Electricity and Magnetism" Energy PPT Download

Description

"Electricity and Magnetism" Energy PPT Download

Part 1: Importing new lessons

Oersted, full name Hans Christian Oersted (1777.8.14-1851.3.9), was a Danish physicist and chemist.

What did he find?

In 1820, during an experiment, Oersted accidentally brought an electrified wire close to a compass and discovered a strange phenomenon. It was this discovery that opened the door for mankind to utilize electrical energy on a large scale.

In this class, we will do his experiment together.

Electricity and magnetism PPT, part 2: exploration experiment

Assemble a circuit that lights a small light bulb

Assemble a circuit where current starts from the positive terminal of the battery, flows through the circuit and back to the negative terminal.

Get to know the compass

The compass has north and south poles and has the property of indicating the north and south directions.

Precautions:

Watch out for short circuits in the wiring. A short circuit in the power supply means that in the circuit, the current does not flow through the electrical appliance and is directly connected to the positive and negative poles of the power supply. If the circuit is short-circuited and the current is very strong, the battery will heat up quickly. So it can only be connected once and disconnected immediately, and the time cannot be long.

Discovered: Put the straightened wire close to the small magnetic needle and turn on the current, the compass pointer direction deviates from the north-south direction; cut off the current, the small magnetic needle returns to the north-south position.

Summary: Straighten the wire and place it above the compass in the same direction as the magnetic needle. Turn on the current and the magnetic needle will deflect. The greater the current, the greater the deflection angle, up to 90 degrees. The current is cut off and the magnetic needle resets.

Electricity and magnetism PPT, part three: expansion and extension

The phenomenon caused by the interaction between electromagnetic fields and conductors is called electromagnetic induction. Oersted discovered the magnetic effect of electric current in 1820, revealing the connection between electricity and magnetism. In 1831, Faraday discovered that when an energized coil is turned on and off, it can induce current in adjacent coils.

Electromagnetism is the general term for the electrical and magnetic properties displayed by matter, such as electromagnetic induction, electromagnetic waves, electromagnetic fields, etc. All electromagnetic phenomena are inseparable from magnetic fields, which are generated by moving charges.

Electricity and magnetism PPT, part 4: In-person testing

1. Fill in the blanks

1. In 1820, Danish science ( ) placed an electrified wire close to a compass and discovered ( ), which opened the door to the large-scale use of electrical energy by humans.

2. Use ( ) and ( ) to make a current detector to detect whether the battery is charged.

2. Choice

1. The famous physicist and chemist ( ) discovered the phenomenon of electromagnetic induction.

A. Ampere B. Faraday C. Newton D. Edison

2. Electric current can be generated ( ).

A. Electricity B. Heat C. Magnetism D. Light

Electricity and Magnetism PPT, Part 5: Homework

After class, check out some relevant knowledge about electricity and magnetism.

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

"Electricity and Magnetism" Energy PPT teaching courseware:

"Electricity and Magnetism" Energy PPT Teaching Courseware Part One: Introduction of New Courses More than 100 years ago, people's understanding of electricity and magnetism was very limited. By chance, Danish scientist Oersted discovered a secret about electricity and magnetism. You want to know this secret...

"Electricity and Magnetism" Energy PPT:

"Electricity and Magnetism" Energy PPT Part One Content: Electrified Wires and Compass Assemble a circuit that lights up a small light bulb. Try to see if the small light bulb lights up? Recall the path electricity takes in a circuit. Put a compass on the table. After the pointer stops swinging, where will the compass point?

"Electricity and Magnetism" Energy PPT Courseware 3:

"Electricity and Magnetism" Energy PPT Courseware 3 Disc controlled by switch 1. What is adsorbed under the disc in the short film? Explain what properties the disk has? What is adsorbed under the disc is steel, which is magnetic. 2. Is the disc a magnet? Why? No, because magnets cannot be used to open...

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Update Time: 2024-10-02

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 1 industry PPT template

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