People's Education Edition Physics for Grade 8, Volume 2
People's Education Edition Ninth Grade Physics Complete Book
People's Education Edition Physics for Grade 8, Volume 1
Shanghai Science Edition Ninth Grade Physics
Shanghai Science Edition 8th Grade Physics
Lu Jiao Edition Ninth Grade Physics Volume 2
Lu Jiao Edition Ninth Grade Physics Volume 1
Beijing Normal University eighth grade physics volume one
Lu Ke Edition High School Physics Compulsory Course One
Guangdong and Shanghai Edition Ninth Grade Physics Volume 1
Beijing Normal University Ninth Grade Physics Volume 1
People's Education Press High School Physics Compulsory Course II
Beijing Normal University Ninth Grade Physics Volume 2
Lu Jiao Edition Eighth Grade Physics Volume 2
Guangdong and Shanghai Edition Ninth Grade Physics Volume 2
Lu Jiao edition eighth grade physics volume 1
Category | Format | Size |
---|---|---|
Lu Jiao Edition Ninth Grade Physics Volume 1 | pptx | 6 MB |
Description
"Household Circuits" Safe Electricity PPT Courseware 2
1. Composition of household circuits
It consists of household wiring, electric energy meter, main switch, insurance device, electrical appliances, wires, etc.
1. Meter
(1) Function: Measure the amount of electrical energy consumed by electrical appliances.
(2) Installation: Install on the main road, before the main switch.
(3) Reading: 123.4 kw·h
2. main switch
Connected in series in the main circuit, it controls the on and off of all circuits in the room.
3. safety device
① Function: When the current in the circuit is too large, the fuse blows and automatically cuts off the circuit to protect it.
② Material: Made of lead-antimony alloy with high resistivity and low melting point.
③ Note: Choose a fuse of appropriate specifications. Do not use copper wire or iron wire instead.
Nowadays, the fuses in the circuits of newly built residential buildings generally use air switches. The air switch is installed behind the electric energy meter. When the current in the circuit is too large, the air switch automatically opens and cuts off the circuit, commonly known as tripping.
2. Live and neutral lines
1. Test pen
(1) Function: Distinguish the live line and neutral line.
(2) Structure:
(3) How to use:
Touch the metal body at the end of the pen with your hand and the metal body at the tip of the pen to touch the circuit under test. If the neon tube emits light, it is touching the live wire, otherwise it is the neutral wire.
3. Master switch
【effect】
Cut off the power supply when troubleshooting circuit faults to avoid electric shock.
【structure】
moving contact static contact
【Install】
Be still, move
【think】
①Why should it be installed like this?
The knife is pushed upward, and the passage
Pull the blade downward to break the circuit
4. Fuse
1. Function: When the current is too large, it will automatically fuse and cut off the circuit to protect the circuit.
2. Production material: Made of lead antimony with high resistance and low melting point
3. Analysis formula: Q=I²RT
4. Do not use copper wire or iron wire instead of fuse
5. Now we use an air switch with a fuse instead of a fuse. When the air switch cuts off the circuit, we must first find the cause of the fault and then restore the power supply after eliminating it.
Class summary
1. Home circuits are composed of entrance lines, energy meters, main switches, fuses, electrical appliances, wires, etc. Understand the functions of each part.
2. Use a test pen to identify the live and neutral wires, and learn about the use of three-wire plugs and the role of leakage protectors.
Keywords: safe electricity use teaching courseware, home circuit teaching courseware, Lujiao version ninth grade physics PPT courseware download, ninth grade physics slide courseware download, safe electricity use PPT courseware download, home circuit PPT courseware download, .PPT format;
For more information about the "Safe Use of Electricity in Household Circuits" PPT courseware, please click on the "Safe Use of Electricity in Household Circuits ppt" tab.
"Home Circuit" PPT:
"Home Circuit" PPT Part One: The composition and connection methods of home circuits Questions: ①What parts does a home circuit consist of? Household wires, energy meters, circuit breakers, sockets, lamp holders, switches. ②How are the sockets and lights connected? What are the benefits of this connection...
"Electric Energy and Social Development" Household Circuits and Safe Electricity Use PPT Courseware 2:
"Electric Energy and Social Development" Household Circuits and Safe Electricity Use PPT Courseware 2 1. my country's Electric Power Industry my country's electric power industry began in 1882. By 1949, the country's power generation was only 4.3109KWh, ranking 25th in the world. By 2000, it jumped Ranking 2nd in the world; currently, our country...
"Electric Energy and Social Development" Household Circuits and Safe Electricity Use PPT Courseware:
"Electric Energy and Social Development" Household Circuits and Safe Electricity Use PPT Courseware 1. my country's Electric Power Industry my country's electric power industry began in 1882. By 1949, the national power generation capacity was only 4.3109KWh, ranking 25th in the world. By 2013, it jumped to No. 1 in the world. At present, in addition to...
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Update Time: 2024-10-27
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