"Electric Energy and Electric Power" Electric Energy and Electric Power PPT Courseware 2

Description

"Electric Energy and Electric Power" Electric Energy and Electric Power PPT Courseware 2

teaching objectives

1. Know electrical energy.

2. Understand electrical power and know the units of electrical power.

3. Understand the electric energy meter, be able to read the electric energy meter, and make simple calculations based on the electric energy meter.

Think and communicate

1. We know that signifiers have the ability to do work. Think about it, does electricity have this ability?

2. What is electric power? Example.

1. Electric energy and electric power:

Electrical energy is converted into light energy and internal energy

Convert electrical energy into internal energy

Convert electrical energy into mechanical energy

electrical energy converted into chemical energy

Summarize

From the perspective of energy conversion, what do the above electrical appliances have in common?

Note: Current does work. It consumes electrical energy. Using electrical appliances to convert electrical energy into other things can express the same meaning.

Inquiry and training

Explore: 1kW·h=3.6×106 J?

1. 1.08×107J=____kW·h

2. The electric rice cooker consumes 0.4kW·h of electric energy in 20 minutes, which is ____J. During this process, the current does _____J work.

Exchange and cooperation

1. How long can 1kwh be used by a 40w bulb? What about 100w?

2. Students present their research results.

2. Discuss the use of electric energy meters and answer the following questions

1. The function of electric energy meter.

2. The meaning of the nameplate data of the electric energy meter.

3. How to read the electric energy meter?

4. How to calculate electricity consumption?

On-site training:

1. A certain electric energy meter reads "2400r/KW.h" and is connected to a certain circuit. It rotates 600 times in 10 minutes. Try to find the electric energy used by the circuit in these 10 minutes as _____KW.h (degrees) , if the electricity bill is 0.6 yuan/kWh, the electricity bill needs to be ______ yuan; total ______J.

Homework and improvement

1. Book homework 1.2

2. Improve, use your home electrical energy meter to measure how much electricity your home uses in a day, pay attention to safety.

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

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Update Time: 2024-09-06

This template belongs to Physics courseware Guangdong and Shanghai Edition Ninth Grade Physics Volume 1 industry PPT template

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