Physics 2 Unit 4

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1. What is static electricity?
This is when certain insulators rub against each other and become electrically charged
2. What happens if objects have opposite electric charges?
They attract
3. What happens if objects have the same electric charges?
They repel
4. How is the size of the current calculated?
I = Q ➗ t

• I = current in amperes A
• Q = charge on Coulombs C
• t = time in seconds
5. Where are ammeters always used?
Ammeters are always used in a series circuit
6. What is meant by potential difference and what is it always used in?
Potential difference is VOLTS and are used in parallel circuits
7. How is the potential difference calculated?
V = W ➗Q

• V = potential difference V
• W = Work done J
• Q = charge in coulombs C
8. What is meant by resistance?
Resistance is a measurement of how hard it is to get current through
9. What factors affect the resistance?
• Type if metal
• Thickness of the wire
• Length of the wire
10. How is the resistance calculated?
Resistance = Volts➗Current
11. What is the relationship between the current and potential difference with a resistor?
The current is directly proportional the potential difference, across a resistor
12. How is the potential difference and current in a Series circuit?
• Total Potential difference = shared between each components
• Current = same all the way through
13. How is the potential difference and current in a Parallel circuit?
• Total Potential difference = the same all the way through
• Current = the sum of the currents through the desperate components
14. How is the current through a component calculated?
I (amp) = Volts➗Resistance
15. What is the relationship between the resistance and the temperature of a filament bulb?
As the resistance increase the temperature increases
 Author: Rvynvega ID: 219083 Card Set: Physics 2 Unit 4 Updated: 2013-05-11 18:14:00 Tags: triple Folders: Description: Current Electricity Show Answers: