hw3sol - CSCI 120 Introduction to Computation Homework 3...

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CSCI 120 Introduction to Computation Homework 3 Solution Saad Mneimneh Visiting Professor Hunter College of CUNY PART 1: Turn me on! (a) Place the two diodes in such a way that the light bulb will be ON. Remember that electrons, like everything in nature, prefer to go through the easy path and, therefore, will avoid the light bulb, whenever possible. + - ANSWER : For the light bulb to be on: the horizontal line must be connected to allow current to flow from source to bulb the vertical line must be disconnected because otherwise it acts as a short circuit and prevents the current from flowing throught the bulb (electrons will like to avoid the bulb and go through the easy path) Therefore, based on the convention (high on tail low on head to conduct), the diode on the horizontal line must be turned clockwise, and the diode on the vertical line must be turned counterclockwise.
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(b) Repeat (a) for the following diagram. There are many possible solutions in this case, because any closed path from the source to the lamp will work. + - ANSWER : For the light bulb to be on, at least one of the horizontal lines must be connected. Therefore, based on the convention (high on tail low on head to conduct) at least one of the diodes must be turned clockwise. PART 2: Playing with Boolean gates
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This note was uploaded on 03/27/2010 for the course CSCI 120 taught by Professor Saadmneimneh during the Spring '09 term at CUNY Hunter.

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hw3sol - CSCI 120 Introduction to Computation Homework 3...

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