# phsycis

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1. what is electricity
is the movement of electrons through something( medium)
2. What are the 2 reasons why electrons move
• 1. they are attracted to protons
• 2. they are hit by another electron and bounce out of the way
3. What is electricity similar to
water moving in a hose
4. What is a circuit
a complete pathway for electrons to travel
5. What happens in a complete circuit
electrons must be able to move back to their starting point
6. What 3 main parts do circuits have
• 1. source of power/electrons ex:battery
• 2. medium for electrons to travel ex: wire and other conductors
• 3. something for electrons to do work on ex: light bulb
7. Define resistor
designed to slow down the flow of electrons
8. What material is resistor made of
made of material that isn't quite considered to be a conductor, but isn't an insulator either
9. Different materials allow circuits to have ______ resistances
different
10. What does a switch allow you to do
allows you to disconnect the circuit when you want electrons to stop flowing and reconnect when you want electrons to resume flowing
11. define closed circuit
circuit is complete and electricity can travel thru it
12. define open circuit
circuit is incomplete and electricity cannot travel thru it. Usually, this occurs when you move a switch to the off position
13. define series circuit
all the objects that work is done are in a straight path
14. How you you travel in a series circuit
you can travel from one object to the next only one way. Are no options
15. Define parallel circuits
objects that work is done on are not in a straight path
16. How do you travel in a parallel circuit
you have options to how you can travel from one object to the next
17. what is an electrical current
electrons in motion
18. what are the 2 main types of currents
Alternating and direct
19. Alternating electrons constantly ________ like in an ____
change directions, outlet
20. Direct electrons move _________ like in a ______
only in one direction, like in a battery
21. How is current measured
is measured in terms of the rate at which electrons travel through a circuit
22. What unit is current symbolized in?
Amperes or Amps (A)
23. What is the tool used to measure current
ammeter
24. What is voltage?
is the measure of the amount of force (pressure) that keeps the electrons flowing across circuit
25. Define medium?
where electrons go through
26. Define AC and an example
electrons constantly change directions. Ex: outlet
27. Define DC and an example
electrons move only in one direction. EX: battery
28. What is the two reasons why electrons move.
• 1. Are attracted to protons.
• 2. They are hit by another electron and bounce out of the way.
29. Define power
is a quantity that measures the rate at which work is done
30. define current
rate at which electrons travel through a circuit
31. define resistance
how much the flow (current) is restricted by the material (resistor)
32. What causes resistance
friction
33. What two relationships are described in Ohm's Law? What's the equation.
Current is directly related to volts and inversely related to resistance.
34. If the distance between two objects is cut in half and the charges remain the same, how much will electrical force between them change?
4x
35. If the charges of only one object doubles, how much will the force between them change?
2x
36. When a circuit is complete, it is called a
closed circuit
37. A unit to tell you the amount of charge in an object
coloumb
38. Rate at which electrical work is done
electrical power
39. When does circuits become overloaded
when the resistance is too low
40. Complete pathway for electrons to travel.
circuit
41. Caused by pressure differences across a resistor
voltage
42. Amount the current decreases when electrons pass through a resistor
resistance
43. The force between two objects is ____ related to the square of the distance between the objects
inversely
44. In the coloumbs law , what does q1 and q2 represent
represent the charges of the two objects
45. Caused by improper, wiring, occurs when electrons have accidental alternate path of travel causing an overloaded circuit?
short circuit
46. Tells is the relationship among force between two objects, charges of the objects, and distance between the objects.
coloumbs law
47. You shock others because you have an excess of these particles in your body.
electrons
 Author: jennx14 ID: 219720 Card Set: phsycis Updated: 2013-05-17 03:01:17 Tags: physcics Folders: Description: pbyscs Show Answers: