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    Circuits and Circuit Elements

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    1. Consider the circuit shown in the attachment.
    a. Do any of the bulbs have a complete circuit when all the switches are open? Which one(s)?
    b. Do any of the switches cause a short circuit when closed? Which one(s)?
    c. Which switches should be kept open, and which should be closed for the following to occur?
    * only bulbs A and B are off
    * only bulbs A and C are off
    * only bulbs B and C are off

    2. A light bulb of unknown resistance is connected in series with a 9.0 Ohm resistor to a 12.0 V battery. The current in the bulb is 0.80 A.
    a. Sketch a schematic diagram of the circuit.
    b. Find the equivalent resistance of the circuit.
    c. Find the resistance of the light bulb.

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    Solution Preview

    Please find the solution attached.

    1 (a) The red arrows represent a closed path with no switches that connects the two poles of the battery through a light bulb. Thus bulb D always completes a circuit, and therefore it is always on.

    1 (b) A short circuit is a closed path between ...

    Solution Summary

    Response gives circuit diagrams for each case in question 1. The circuits and circuit elements are examined.