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Transcript
I’M SHOCKED THAT I NEED TO REMEMBER THIS!
1. Explain the difference between an object that is charged and one that is polarized.
2. Explain the difference between charging an object by conduction and induction.
3. How would you charge an object negatively, if all you have is a positively
charged foam rod and a grounding wire?
4. What is the difference between Coulomb’s Law and Ohm’s Law?
5. How is electric field direction determined? Draw the electric field around a
positively charged object.
6. Define current. What is the current when 30 coulombs of charge flow past a
certain point in 10 seconds?
7. In what way is electric potential energy like gravitational potential energy?
Can you think of a way in which they are different?
8. Why is a voltage necessary in order for electric current to flow?
9. Calculate the electric force between two charges (4
coulombs) that are 1.4 meters apart.
coulombs and –5
Is this an attractive or repelling force?
If the distance between the charges increases to 2.8 meters, what is the new force?
12. Draw a circuit diagram showing 3 resistors (3, 5, and 8 ohms) in series.
The voltage for the circuit is 12 volts. Find the total resistance and current.
13. Draw a circuit diagram showing 2 lights in parallel. The resistances of the
light bulbs are 6 and 12 ohms. If the voltage is 24 volts, what is the total
resistance and total current?
14. Identify the electrical term that uses each of the following units:
coulomb -
joule –
ohm -
volt –
newton/coulomb-
ampere-
newton-