Try to run the Circuit Construction Kit (DC Virtual Lab) at http://phet.colorado.edu – look under "Physics" and find the right one. It should work on any browser/OS. It works just the way it looks like it should, you drag circuit elements onto the main screen area and hook them together. You can stretch and shrink wires to make them fit, and an important trick is to CTRL-click on something to change its value or to unhook elements. Create the circuit at left, where the resistor is a light bulb with R = 10 0. You should see the light bulb light up and the electrons flowing (the simulation can show the actual (not conventional) current, where the electrons are moving). Figure out how to use the ammeter in the

College Physics
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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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Try to run the Circuit Construction Kit (DC Virtual Lab) at http://phet.colorado.edu – look under
"Physics" and find the right one. It should work on any browser/OS. It works just the way it looks like it
should, you drag circuit elements onto the main screen area and hook them together. You can stretch and
shrink wires to make them fit, and an important trick is to CTRL-click on something to change its value or
to unhook elements.
Create the circuit at left, where the resistor is a light bulb
with R = 10 0. You should see the light bulb light up
and the electrons flowing (the simulation can show the
actual (not conventional) current, where the electrons
are moving). Figure out how to use the ammeter in the
toolbox on the right to take current readings.
1.
What is the current in the circuit?
2.
Is the current the same on either side of the
light bulb?
6V
10Ω
3.
What is the voltage drop across the bullb?
4.
Does this equal the voltage gain supplied by
the battery?
Does this mean that o E dl = AV = 0 for a
5.
closed path around the circuit? (I'l answer it for you:
YES!)
6.
Power supplied by the battery (P = IV)?
7.
Power dissipated in the bulb (P = 1 R)?
8.
Are they the same? (They better be!)
Now try this new circuit, where the light bulbs are in se-
ries, which means that all the current that goes through
one must go through the other.
10Ω
9.
What is the current in the circuit?
Is the current the same everywhere?
10.
6V
11.
What is the voltage drop across each bulb?
Does the sum of the voltage drops across each
bulb equal the voltage gain supplied by the battery?
12.
10Ω
13.
Power supplied by the battery?
14.
Power dissipated in each bulb?
Transcribed Image Text:Try to run the Circuit Construction Kit (DC Virtual Lab) at http://phet.colorado.edu – look under "Physics" and find the right one. It should work on any browser/OS. It works just the way it looks like it should, you drag circuit elements onto the main screen area and hook them together. You can stretch and shrink wires to make them fit, and an important trick is to CTRL-click on something to change its value or to unhook elements. Create the circuit at left, where the resistor is a light bulb with R = 10 0. You should see the light bulb light up and the electrons flowing (the simulation can show the actual (not conventional) current, where the electrons are moving). Figure out how to use the ammeter in the toolbox on the right to take current readings. 1. What is the current in the circuit? 2. Is the current the same on either side of the light bulb? 6V 10Ω 3. What is the voltage drop across the bullb? 4. Does this equal the voltage gain supplied by the battery? Does this mean that o E dl = AV = 0 for a 5. closed path around the circuit? (I'l answer it for you: YES!) 6. Power supplied by the battery (P = IV)? 7. Power dissipated in the bulb (P = 1 R)? 8. Are they the same? (They better be!) Now try this new circuit, where the light bulbs are in se- ries, which means that all the current that goes through one must go through the other. 10Ω 9. What is the current in the circuit? Is the current the same everywhere? 10. 6V 11. What is the voltage drop across each bulb? Does the sum of the voltage drops across each bulb equal the voltage gain supplied by the battery? 12. 10Ω 13. Power supplied by the battery? 14. Power dissipated in each bulb?
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