Chapter 4- Physics Flashcards
Static
Non moving electrical charge always formed by friction
What is the structure of an atom and how does it contribute to static?
- Composed of protons, neutrons and electrons.
- Atoms are rubbed together in static electricity, this causes electrons on the outside of the atom to be either rubbed on or off the atom.
Types of static and how they are formed
- Negative is caused by electrons rubbing onto an atom
- Positive is caused by electrons rubbing off of an atom
What is the nature of static
1) + +(repulse)
2) - -(repulse)
3) - +(attract)
4) - -/+ no charge>attract
5) + +/-
What are some uses of static?
- Sandpaper
- Swifer
- Saran Wrap
- Rubbing sticks to make fire
- Matches
- Photocopiers
What’s the measurement of static?
-Static is measured as Coulombs (C)
Current
-The movement of electrons
What is a conductor and what are some examples of one?
- Are materials that allow electrons to move freely
- Gold and Silver=super conductors
- Copper and Aluminum=good conductors
- In pure water= fair to good
- Metals=good
What is an Insulator and what are examples of one?
-Prevent electrons from moving, they control current
Examples: rubber on plastic products, air, dry wood, fiver glass, glass, ceramics
What is Electrical Potential and how is it formed?
- Desire for electrons to travel
- Formed by creating an area that’s highly negative and another that’s highly positive
How is Electrical Potential measured?
It is measured in volts
Series and Parallel- which one is stronger and why?
Series: has a single pathway for electrons to travel, overall increase in voltage but not in duration. Has more cells in Series so it is the stronger of the 2.
Parallel: cells have more than 1 pathway to move electrons, no increase in voltage but increase in duration, not as strong as Series
