Midterm 2 Concept Questions

Midterm 2 Concept Questions - Conceptual Problems 1 The...

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Conceptual Problems 1. The figure shows a portion of a circuit. What are the magnitude and direction of the current I in the lower right-hand wire? 2. The figure shows conduction electrons moving leftward in a wire. Are the following leftward or rightward: (a) the current, (b) the current density, (c) the electric field in the wire? 3. The figure shows three cylindrical copper conductors along with their face areas and lengths. Rank them according to the current through them, greatest first, when the same potential difference is placed across their lensths. 4. The table gives the current I (amperes) through two devices for several values of potential difference V (volts). From these data, determine which device does not obey Ohm's Law. 5. A potential difference V is connected across a device with resistance R, causing current I through the device. Rank the following variations according to the change in rate at which electrical energy is converted to thermal energy due to the resistance, greatest first. 6.

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This note was uploaded on 01/10/2012 for the course PHYS 2114 taught by Professor Bandy during the Spring '08 term at Oklahoma State.

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Midterm 2 Concept Questions - Conceptual Problems 1 The...

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