Lesson 4 - Static Electricity

Lesson 4 - Static Electricity

Mr. K

Open Ended

What concepts did we talk/observe in our last class together?

Charging by Friction

• When 2 _________ objects are rubbed together one of those materials is going to be more willing to give up electrons.

• Some objects have a strong affinity for electrons and gain them more readily

• While other objects have less of an _________ for electrons and hold them weaker.

Poll

What has a greater affinity for electrons?

• Fur

• Plastic Rod

Charging by Induction

• You can create a charge in a neutral object by bring a charged object close to it.

• This is a ______________ occurrence, because no electrons are transferred and neutrality returns when the charged object is removed.

• Induction charging will always attract a neutral object.

Open Ended

What will happen when you bring a positively charged rod to a neutral pith ball?

Charging by Conduction

• Conduction occurs when you have a neutral object come in ___________________ with a charged object

• We consider conduction charging __________________ because there is a transfer of electrons.

• Whatever the charge of the charged object will be what is __________________ to the neutral object.

Grounding

• This is the removal of a charge by producing a conductive path to the ground.

• The Earth is unique in that it will accept and give electrons to neutralise objects.

• Electrons will move from a negatively charged object to the ground until neutral

• Electrons will move from the ground to neutralise positively charged objects.

Poll

Grounding is essential without it we would all surely perish!

• Yes

• No