"Where Does Electricity Come From" Energy PPT Courseware 2

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"Where Does Electricity Come From" Energy PPT Courseware 2

Electricity has a wide range of uses and is easy to use. People are increasingly inseparable from electricity. Where does the electricity we use come from?

In the previous lesson, we learned about the conversion of electrical energy into other forms of energy.

This lesson looks at other forms of energy that can be converted into electrical energy.

Do we recognize these batteries? How are they similar and different?

What energy do they convert into electrical energy?

Did you answer it correctly?

Ordinary batteries convert chemical energy into electrical energy at once.

Photovoltaic cells convert light energy into electrical energy.

Photovoltaic cells cannot store electricity and can only be used immediately.

The battery converts chemical energy into electrical energy when discharging, and converts electrical energy into chemical energy when charging. It can also be understood that it stores electrical energy in the form of chemical energy and outputs it when needed.

How else can we get electricity?

Turning the hand generator generates electricity to light up small light bulbs.

If you turn a small electric motor, will it generate electricity? Can you light a small light bulb?

Mechanical energy is converted into electrical energy and lights up the small light bulb

Class summary

1. Electricity is not a naturally occurring energy, but a secondary energy converted from other energy (wind energy, water energy, thermal energy, etc.).

2. Electrical energy is converted from other forms of energy.

Test questions in class

1. True or False Questions (mark √ if correct, × if incorrect)

1. The electricity in the battery can also drive machines, electric fans, refrigerators, etc. ( )

2. Our country has built many power stations, such as thermal power stations, hydroelectric power stations, Qinshan Nuclear Power Station, etc. all over the country. ( )

3. The current generated by the battery is relatively weak, while the current generated by the large generator is strong. ( )

4. The electricity in dry batteries is obtained through friction. ( )

5. When testing, the magnetic needle should be kept away from the small motor because there are magnets in the small motor ( )

6. A power supply is a device that converts other forms of energy into electrical energy. ( )

2. Multiple choice questions

1. The electricity used by household appliances such as lamps and televisions is supplied by ( ).

A. Power station B. In the battery

2. The electricity used by household appliances is ( )

A. different B. same

3. ( ) There is a risk of electric shock, ( ) there is no risk of electric shock.

A. Dry battery (direct current) B. Alternating current

4. Turn ( ) when the battery is discharging.

A. Chemical energy is converted into electrical energy. B. Chemical energy is converted into thermal energy. C. Electrical energy is converted into chemical energy.

5. The electric energy produced by nuclear power plants is converted from ( ).

A. Mechanical energy B. Thermal energy C. Atomic energy

6. The amount of power generated by the generator has nothing to do with ( ).

A. Rotation speed B. Motor size

C. Direction of rotation

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For more information about the PPT courseware "Energy Where Electricity Comes From", please click the Energy ppt Where Electricity Comes ppt tag.

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"Where Does Electricity Come From" Energy PPT Teaching Courseware Part One: Introduction of New Lessons Electricity has a wide range of uses and is easy to use. People's lives are increasingly inseparable from it. So, where does the electricity we use come from? Today, we will study this issue together. ..

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"Where Does Electricity Come From" Energy PPT:

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Update Time: 2024-09-30

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

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