StudyGuideChapter27 - Current and Ohm's Law Study Guide for...

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Current and Ohm's Law Study Guide for Chapter 27 Outline 1. Electric Current Electric current magnitude is the flow of electric charge. The of the current is the charge per unit time that flows through the conductor: M œ M œ U .U > .> ? or Current is measured in (A, often pronounced “amps”), where A C s. amperes " œ " Î The of a current is the direction in which the positive charges are flowing. If direction negative charges are flowing instead, the current is in the opposite direction of charge flow. If you know the current in a conductor, you can find out how much charge passes through the conductor over a period of time using the formula U œ M > U œ M .> ? or ( Problems: 1, 7, 9 2. Resistance and Ohm's Law A is any object that charge has difficulty flowing through. Charge will only move resistor through a resistor if it is pushed through by a potential difference. The main result of this section is , which relates the potential difference across a Ohm's law resistor with the current that flows through:
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This note was uploaded on 11/28/2010 for the course PHY 56705 taught by Professor Turner during the Spring '10 term at University of Texas at Austin.

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StudyGuideChapter27 - Current and Ohm's Law Study Guide for...

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