Electricity and Circuits

Directions

Several of the following problems are missing some of the given variable information (labeled in red with "ABI" or assigned by instructor). Your instructor will provide the values through the Message Center, in the "From Your Instructor" section of the lesson, or in an Announcement on the course Home Page. Use the values provided by your instructor to answer each question. Show all work with units in your work. Use appropriate labels and units.

Be sure to type all work, diagrams, explanations, and final answers as it is too difficult to read hand-written work after going through the various systems to get to your instructor. Also, this is good practice as you will have to type the midterm and final exam free response items as well.

1. You have a closed circuit consisting of 2 batteries, 2 light bulbs, and a switch. Explain using the terms discussed within the lesson how you could:

a. Increase the current in the circuit.

b. Decrease the current in the circuit.

2.What is the voltage of a bulb that has a resistance9.5 ? The current through the bulb is2.0 A.

3.Jack makes a protein shake every morning. The blender used90.0 Wof Power. If the current supplied is4.5 A, how many volts are necessary to make the smoothie? (5 points)

4.For the circuit below, calculate the total current for the circuit and the voltage at each resistor.

(Note - the resistor values and voltage will be assigned by instructor (R1 = 14 , R2 = 82 , R3 = 72 , and R4 = 83 ) and voltage (4.5 V). (10 points)

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