New York City College of Technology Ohm’s law & resistors in parallel & in series Lab 4 Class: PHY 1434-E475 Due date: March‚ 13 20144 Group Names: Hisham Sageer Objectives: Our object is to confirm Ohm’s law by analyzing the dependence of the electrical current as a function of voltage and as a function of resistance. Also‚ we studied the current flow and voltage in series and parallel. Finally‚ the lab determined the equivalence resistance of series and
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Ohm’s Law Go to http://phet.colorado.edu/simulations/sims.php?sim=Ohms_Law and click on Run Now. Wire Resistance and Ohm’s Law Procedure Part I Wire Resistance: open the PhET Simulation Electricity‚ Magnets‚ and Circuits ( Resistance in a Wire. As wire length (cm) increases‚ the resistance (Ω) _increases________ As wire area (cm2) increases‚ the resistance (Ω) _decreases_________ As wire resistivity (Ωcm) increases‚ the resistance (Ω) _increases____ Procedure Part II: Ohm’s Law: Electricity
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GEORG SIMON OHM Georg Simon Ohm (16 March 1787 – 6 July 1854) was a Bavarian (German) physicist and mathematician. As a high school teacher‚ Ohm began his research with the new electrochemical cell‚ invented by Italian scientist Alessandro Volta. Using equipment of his own creation‚ Ohm found that there is a direct proportionality between the potential difference (voltage) applied across a conductor and the resultant electric current. This relationship is known as Ohm’s law. Ohm died in Munich
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Research Paper – Georg Ohm Georg Ohm was a German physicist born in March of 1789. Georg came from a Protestant family. His father who was a locksmith Johann Wolfgang Ohm‚ and his mother who is Maria Elizabeth Beck‚ was the daughter of a tailor. Even though his parents had not been really educated at the time‚ Ohm’s father was a very wise man who had educated himself and his son Georg. In my research I found out that he wrote an elementary grade geometry book while teaching mathematics at
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) The formula is : Divide ohm—centimeters by 100 to convert to ohm—meters. Just watch your units. Example: You have decided to install three meter long ground rods as part of your grounding system. To measure the soil resistivity at a depth of three meters‚ we discussed a spacing between the test electrodes of three meters. To measure the soil resistivity start the Fluke 1625 and read the resistance value in ohms. In this case assume the resistance reading is 100 ohms. So‚ in this case we know:
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Electrical Cable Cross section is just a two-dimensional view of a slice through an object. An often asked question: How can you convert the diameter of a round wire d to the circle cross section surface or the cross-section area A (slice plane) to the cable diameter d? Resistance varies inversely with the cross-sectional area of a wire. | ------------------------------------------------- Top of Form | Wire diameter d | unit | | | Cross-sectional area A | unit2 | | |
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Current is a flow of electrical charge carriers‚ usually electrons or electron-deficient atoms. The common symbol for current is the uppercase letter I. The standard unit is the ampere‚ symbolized by A. One ampere of current represents one coulomb of electrical charge (6.24 x 1018 charge carriers) moving past a specific point in one second. Physicists consider current to flow from relatively positive points to relatively negative points; this is called conventional current or Franklin current. Electrons
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Wire Resistance and Ohm’s Law Procedure Part I Wire Resistance: open the PhET Simulation Electricity‚ Magnets‚ and Circuits Resistance in a Wire. As wire length (cm) increases‚ the resistance (Ω) _increases________________ As wire area (cm2) increases‚ the resistance (Ω) _____decreases_____________ As wire resistivity (Ωcm) increases‚ the resistance (Ω) ____increases___________ Procedure Part II: Ohm’s Law: Electricity‚ Magnets‚ and Circuits Ohm’s Law mA is milliamps‚ and ___1000______
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MEASUREMENTS AND ELECTRONIC INSTRUMENTS (EE21004) TUTORIAL-I SECTION 1: QUALITY OF MEASUREMENTS Q1. (a) A meter ‘I’ has ± 5% accuracy on true value while another ‘II’ has ±5% accuracy on scale range. Both the meters have the same scale range. Calculate the ratio of accuracy of the two meters for a deflection of 10% of full scale range in each meter. [1:10] (b) A 0-100V voltmeter has 200 scale divisions which can be read to half a division. Determine resolution of meter in volt. [0.25 V] (c)
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NEW DIGAMBER PUBLIC SCHOOL Session :- 2012-13 subject :- Factors affecting internal resistance of a cell Made by :- Saurabh godha (xii - B) submitted to :- Mr. Harshad shevgaonkar Certificate NAME : Saurabh Godha CLASS : XII - B ROLL NO. : 19 INSTITUTION : New Digamber Public School This is certified to be the bonafide work of the student in the PHYSICS INVESTIGATORY PROJECT during the year 2012 / 2013 . ............................
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