7.2 electric force. force – push or pull contact forces – forces that can have an effect only...

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CHAPTER 7 NOTES 7.2 Electric Force

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Page 1: 7.2 Electric Force. Force – push or pull Contact forces – forces that can have an effect only on objects they touch Electric forces– push or pull

CHAPTER 7 NOTES7.2 Electric Force

Page 2: 7.2 Electric Force. Force – push or pull Contact forces – forces that can have an effect only on objects they touch Electric forces– push or pull

ELECTRIC FORCE

Force – push or pull Contact forces – forces that can have

an effect only on objects they touch Electric forces– push or pull between

charged objects Action-at-a-distance – a force can be

applied without touching an object

Page 3: 7.2 Electric Force. Force – push or pull Contact forces – forces that can have an effect only on objects they touch Electric forces– push or pull

LAWS OF STATIC CHARGE

Like charges repel Opposite charges attract Neutral objects are attracted to

charged objects

Page 4: 7.2 Electric Force. Force – push or pull Contact forces – forces that can have an effect only on objects they touch Electric forces– push or pull

Charging a neutral object by touching it to a charged object is called charging by conduction

Charging by induction is when an charged object is brought near another object and while no electrons are actually transferred, they will reposition themselves further away or closer depending on the charge Charging by induction explains why neutral objects are

attracted to charged ones Example – a photocopier uses powdered toner to

statically cling to a paper before it’s baked on (see page 261 for all the steps)

Page 5: 7.2 Electric Force. Force – push or pull Contact forces – forces that can have an effect only on objects they touch Electric forces– push or pull

DIAGRAMS

Charging by conduction

Charging by induction

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