"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 3

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"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 3

create scenarios

Electromagnets are widely used in production and life:

Such as: electromagnetic lifting, electromagnetic concentrator, telephone, electric bell, electromagnetic relay, etc.

Knowledge point one: electromagnetic relay

1. Structure: The electromagnetic relay is composed of an electromagnet, an armature, a spring, a static contact, a moving contact, etc.

2. Principle: Electromagnetic relays work by utilizing the magnetic effect of current.

3. The essence of electromagnetic relay is to use electromagnets to control the on and off of the working circuit ( ).

4. Application of electromagnetic relay: The use of electromagnetic relay can realize the work of using low voltage and weak current to control high voltage and strong current; it can also realize remote control and automatic control. Such as: automatic water level alarm, anti-theft alarm, etc.

How flood control alarms work

Thinking: When the water level exceeds the warning line, how is the control circuit turned on, and how is the alarm circuit turned on and alarmed?

burglar alarm

Thinking: When someone steps on the pedal, how does the alarm sound?

How the thermostat works

Think: How does an incubator work?

Solenoid valve door

1. Structure: The solenoid valve is composed of a valve body, a slide valve, an armature, an electromagnetic coil, etc.

2. Working principle: The solenoid valve door realizes the presence or absence of magnetism by changing the current on and off in the coil. The movement of the electromagnet drives the slide valve to move, completing the closing and opening of the door.

maglev train

1. Working principle of maglev train: Maglev train mainly relies on the action of magnetic field to achieve support, guidance, traction and braking functions. When the train is running, the electromagnet on the train interacts with the magnetic field generated by the track coil (the magnetic poles of the same name repel each other), causing the train to receive a large upward force, and the train will float above the track. This reduces the friction in train operation and greatly increases the speed of the train.

2. Advantages of maglev trains: high speed, comfort, no noise, no pollution, and low energy consumption.

3. The streamlined body shape can reduce air resistance.

I'll choose

Among the following examples, electromagnets are not used ( )

A.Generator B.Electric motor

C. Electric bell D. Electric water heater

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For more information about the PPT courseware "Magnetic Phenomenon Electromagnet and Its Application", please click the Magnetic Phenomenon ppt Electromagnet and Its Application ppt tag.

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 6:

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 6 1. Advantages of Electromagnets 1. The presence or absence of magnetism of electromagnets can be controlled by turning on and off electricity. 2. The magnetic strength of the electromagnet can be controlled by the size of the current. 3. The magnetic poles (south and north pole) of the electromagnet can...

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 5:

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 5 Thinking Review 1. What is the difference between electromagnets and ordinary magnets? 2. How can the presence and strength of the magnetism of the electromagnet be controlled? 3. Why is the core of electromagnet made of soft iron? Instead of steel...

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 4:

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 4 Apply what you learn 1. The scientist who first discovered the magnetic effect of electric current is: _____. 2. Oersted's experimental explanation: There is a magnetic field around a current-carrying conductor. The direction of the magnetic field and the direction of the current Regarding 3. Magnetic induction of energized solenoid..

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Update Time: 2024-10-20

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