Induction, conduction & friction

Induction, conduction & Friction

Transfer of Electric Charge -review

• An electrical conductor is a material in which

charges can move freely.

• An electrical insulator is a material in which charges

cannot move freely.

​Transfering charges

• 3 ways to transfer charges:

  • Conduction

  • Friction

  • Induction

• Remember - only ELECTRONS can move from one object to another

Multiple Choice

What are 3 ways to transfer electrical charges

• friction, insulators, & conductors

• insulators, conductors, & electrons

• friction, induction, & conduction

• electrons, protons, & neutrons

​Friction

• Electrons are transfered from one object to another by rubbing them together.

• Example: socks on a wool carpet or a balloon on your sweater

• Electrons move from one object to another, afterwards one object is (+) charged and the other is (-) charged.

Multiple Choice

Protons move during friction transfer to make objects postively charged.

• True

• False

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​Conduction

• Electrons are shared so that both objects are charged at the end.

• Objects with excess electrons transfer them by touch to another object.

• Charges equal out between the objects.

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Multiple Choice

During conduction, objects with excess electrons transfer them by _____ to other objects.

• transfer

• jumping

• touching

• flying

Multiple Choice

With conduction_____ are _____ so that both objects are charged in the end.

• electrons, shared

• electrons, transfered

• protons, shared

• protons, transfered

Transfer of Electric Charge - induction

• A surface charge can be

induced on insulators by
polarization.

• Induction - a charged object "pushes" the charges of a neutral object due to repellent forces.

• When the charged object is removed the neutral object returns to "normal"

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Multiple Choice

_____ "pushes" charges o fa neutral object due to _____ forces.

• Conduction, repellent

• Friction, repellent

• Induction, attractive

• Induction, repellent