"Electric Energy" Electric Power PPT Courseware 2

Description

"Electric Energy" Electric Power PPT Courseware 2

learning target

Learn about the various sources and applications of electrical energy.

Know electrical energy and its units and use a home energy meter.

Understand the importance of saving electricity.

Discussion and exchange

What methods of generating electricity have you learned from pictures or life?

How is energy converted during the power generation process?

What other methods of generating electricity do you know?

Self-study tips

1. Learn what the units of electrical energy are and the conversion relationships between the units by reading page 72.

2. Understand the role of 1 kilowatt hour of electricity by looking at the pictures on page 74, and think about how to save electricity in daily life.

3. By reading page 72, you can know ① the function and reading method of the electric energy meter and ② the meaning of the contents on the nameplate of the electric energy meter.

4. Through the textbook introduction and the information collected before class, can you tell what other new types of electric energy meters you know in addition to the common electric energy meters?

Effect detection

1. The commonly used unit of electrical energy in households is ____, whose scientific name is ________ and symbol ____. In the International System of Units, the unit of electrical energy is ______, abbreviated as ____, and symbol ___.

1kw·h=_______J.

7.2x106 J =____kw·h.

2. What are the functions of 1 kilowatt hour of electricity?

3. How to save electricity?

3. The electric energy consumed by electrical appliances within a period of time can be measured by _______. The number on the electric energy meter is in ______.

4. How to read the electric energy meter: The ____________________ on the counter of the electric energy meter within a period of time is the electric energy used during this period.

5.The meaning of each parameter on the electric energy meter

There are several important parameters of the electric energy meter that should be noted:

"220V" means that this energy meter should be used in a 220-volt circuit.

"10 (20) A" means that the calibrated current of this electric energy meter is 10 A. In short-term applications, the current is allowed to be larger, but it cannot exceed 20 A.

"50Hz" means that this energy meter is used in an AC circuit of 50 Hz.

"600/kW·h" means that for every electrical appliance connected to this electric energy meter that consumes 1 kilowatt hour of electric energy, the turntable on the electric energy meter rotates 600 times.

Homework

1. Which of the following units is the unit of electrical energy ( )

A. Watt B. Joule C. Kilowatt hour D. Ohm

2. Which of the following instruments can directly measure electrical energy ( )

A.Ammeter B.Voltmeter C.Electroscope D.Energy meter

In-class training two:

Example 1: The readings on the electric energy meters of three classmates, Xiao Hong, Xiao Ming and Xiao Hua, are as shown in Figure 1. Please read out their readings.

Example 2: If after one month, the electricity meter numbers of three classmates’ homes change as shown in Figure 2, how much electricity did these three classmates’ homes use in a month?

Example 3: The number displayed on Xiaoqiang’s electric energy meter at the beginning of this month is __________, and the electricity consumption shown on the electricity bill receipt at the end of the month is 30kw·h. Then the number displayed on the electric energy meter at the end of the month should be __________, and the electricity consumed this month is _________ _degree, combined with _________J, if 1 kilowatt hour of electricity is 0.50 yuan, then Xiaoqiang’s family should pay __________ yuan for electricity.

After-class exploration:

After you go back today, write down the reading on your home's electrical energy meter. Compare it with the reading a week later. If you follow our charging standard of 0.50 yuan/kw·h, calculate the electricity bill that should be paid during this week, and estimate your home's electricity bill based on the results. annual electricity consumption. Assuming that the electricity produced is only for household use, how many households can my country's total power generation capacity of 4.7 trillion kilowatt hours in 2011 be used by?

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For more information about the "Electric Energy and Electric Power" PPT courseware, please click on the Electric Energy ppt Electric Power ppt tag.

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Update Time: 2024-10-02

This template belongs to Physics courseware Lu Jiao Edition Ninth Grade Physics Volume 1 industry PPT template

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