Activity 1.1.1Simple Machine Investigation
Name ____________________________
Date _______________ Period _____
|POE 1.2-09 Energy Sources Unit Test |
MULTIPLE CHOICE: Choose the best response to the question and write the letter on the line provided.
____ 1) What is the value of the current in a light bulb with a resistance of 1.2 [pic] connected to a 110 volt power source?
A. 91.7 [pic] B. 132 A
C. 91.7 A D. 10.9 A
____ 2) In a series circuit, the total voltage
A. is the same everywhere in the circuit
B. equals the sum of the voltages across each of the components
C. depends on the amount of current flowing
D. depends on the number of resistors in the circuit
____ 3) In a parallel circuit, the total current
A. is the same everywhere in the circuit
B. equals the sum of the current in each of the branches
C. depends on the amount of total voltage
D. depends on the number of resistors in the circuit
____ 4) You are raising a flag on a flagpole. You apply 2 kg of force to the rope to raise the flag 10 meters in 5 seconds. The amount of power you expend doing so is
A. 200 watts B. 100 watts
C. 40 watts D. 25 watts
____ 5) In Physics, a Joule is related to
A. Work B. NewtonMeters
C. Force times Distance D. all of the above
____ 6) Electron flow is another name for
A. power B. voltage
C. resistance D. current
____ 7) An atomic element has 6 electrons in its valence orbit, which will make it
A. a conductor B. radioactive
C. an insulator D. non-renewable
____ 8) Voltage in an electrical circuit is comparable to the _____________ in a water system.
A. flow B. obstructions
C. pressure D. leaks
____ 9) Even if a circuit is broken, __________ can still be present.
A. voltage B. electron flow
C. current D. continuity
____ 10) Adding resistance to a circuit will
A. increase the total voltage B. decrease the total voltage
C. increase the total current D. decrease the total current
____ 11) A light bulb in a circuit acts as
A. an electromotive force B. a power supply
C. a resistor D. a capacitor
____ 12) If you remove a light bulb in a series circuit, the remaining lights in the circuit will
A. go out B. remain lit
C. blow up D. flash off and on
Free Response: For each of the following problems, be sure to answer each question completely and to show all of your work. All answers should be accurate to three significant digits, and include units where appropriate.
For each of the resistors shown below, use Ohm’s law to calculate the unknown quantitiy. Write your answer in the space provided.
13. 14. 15.
[pic] ________ [pic] ________ [pic] ________
For each of the circuits below, indentify the type of circuit, and then calculate the value for RT. Write your answer in the space provided.
16.
Type of circuit ____________
[pic] ________
17.
Type of circuit ____________
[pic] ________
18. Given the schematic diagram below, use the laws of circuit theory to solve for RT, IT, VR1, VR2, and VR3. Write your answers in the space provided.
[pic]________
[pic]________
[pic]________
[pic]________
[pic]________
19. Using the calculated results from the problem above, verify your results using Kirchhoff’s voltage law. Be sure to show your work.
20. Given the schematic diagram below, use the laws of circuit theory to solve for RT, IT, IR1, IR2, and IR3. Write your answers in the space provided.
[pic]________
[pic]________
[pic]________
[pic]________
[pic]________
21. Using the calculated results from the problem above, verify your results using Kirchhoff’s current law. Be sure to show your work.
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