Electricity Flashcards
What is the conservation of energy law
- Energy cannot be created or destroyed, only transferred.
Attract or repel?
- Positive & Positive
- Negative & Negative
- Positive & Negative
- Proton & Electron
- Electron & Electron
- Repel
- Repel
- Attract
- Attract
- repel
What is an insulator?
- Material that does not allow charge or heat to pass through it easily.
What is a conductor?
- A material which allows charge to move easily through it.
What does earthed mean?
- Connected to the ground directly or indirectly so that electric charge flows from an object, preventing a dangerous build-up of static electricity.
What is Static Phenomena?
- Electrons are negative and they can move between objects.
Electrons have a ____1____ charge and can move between objects
- Negative
____1____ forces can strip electrons away from conductors because the material only holds them loosely.
- Frictional
Static charge builds up on ____1____ or isolated conductors because the object cannot gain or lose its electrons to ____2____ its charge
- Insulators
- Balance
Objects which are ____1____ do not experience static effects because the ____2____ can move to or from earth.
- Earthed
- Electrons
What is Potential difference?
- The energy transferred per unit charge
What is current?
- The rate of flow of charge
What is resistance?
- Opposition to the flow of charge
What is power?
- The energy transferred per unit time.
Current & resistance have an _________ proportional relationship.
- Inversely
e. g. if you increase the current, the resistance will decrease
