Anna Holster Introduction to the Sciences Wentzel Briar CTU Virtual Login Individual Project 1 01/14/13 The statement that; “Computers are part of our everyday lives.” Is so correct‚ I don’t think the people of today would know how to do anything without the computer. Between the desktop top computers and laptops to the smart phone everything can be stored using less space and the ability to locate stuff so much more easier that if the world of today lost computers around the world for even
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electrical current‚ which is measured in a unit called amperes (also called amps for short). Electrical current cannot just flow on its own; it needs something to "push" it. Voltage (also referred to as electric potential) is what pushes electrical current through wires. Voltage is measured in volts‚ and the symbol for volts is V. The general purpose is to determine the voltage of a potato; with this experiment we intend to answer the following questions: 1. How much voltage and/or current does it
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Erickson & Kevin Haar February 14‚ 2014 PreLab With the new understanding of quantum mechanics and solid-state physics in the 1930’s came the development of semiconductors. Semiconductors are materials such as silicon and germanium in which the current density is non-zero‚ unlike an insulator‚ yet still several magnitudes smaller than that of a conductor. There exists a significant energy gap between the filled valence – highest range of electron energies normally present at absolute zero – and
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electrons move through a conductor‚ electricity flows‚ which illustrates the moving of electrons in the wire which collide with the ions in the metal. This then makes it more difficult for the current to flow‚ causing more resistance. When these electrons move they create an electric current. The electric current being measured from different lengths of wires is what this experiment is conducted by. Hypothesis: The hypothesis for this experiment is this: as the length of the conductive putty wire
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This increases the amount of collisions therefore there is more resistance. However it is hard to keep the temperature exactly the same as the room temperature might change from day to day. It is essential to use a low voltage because it means a low current that will not heat
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Battery Purpose To demonstrate how an electrical current can be generated using citrus fruits (such as lemons or limes) that is strong enough to power a small light bulb. Additional information Batteries are devices that store chemical energy and convert it to electrical energy. Consisting of one or more voltaic cells‚ batteries come in various sizes and forms and are integrated into most electronic and portable devices. Electrical current is the flow of electrons (movement) of an electrical
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DC Circuits: Electric Power PHY 114 Lab Report 10/09/2013 Abstract: The purpose of this experiment was to look at electric power dissipated in a load resistor in a circuit with a real power source‚ which has a finite internal resistance. We discover a surprising result about how to deliver the most power to a device from a source. Consider a simple circuit in which a battery of voltage drives a current through a resistor of resistance. As we have seen‚ the battery is continuously doing
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Watts R = Resistance = Ohms I = Current = Amperes E = Force = Volts 1-1 OHM’S LAW DIAGRAM AND FORMULAS E I E = I x R I = E ÷ R R = E ÷ I R Voltage = Current x Resistance Current = Voltage ÷ Resistance Resistance = Voltage ÷ Current POWER DIAGRAM AND FORMULAS P E I = P ÷ E E = P ÷ I P = I x E I Current = Power ÷ Voltage Voltage = Power ÷ Current Power = Current x Voltage 1-2 OHM’S LAW AND IMPEDANCE E = VOLTAGE (IN V) I = CURRENT (IN A) Z = IMPEDANCE (IN Ω) E
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charge of 500 mC (milli Coulombs) flows through a wire in 25 mS. What is the current? 20 A 6. A charge containing 3.7x1014 electrons flows through a wire in 150 uS (micro seconds). What is the current? .3933 A or 393.3 mA 7. A current of 5 mA flows through a wire for 10 seconds. How many electrons were involved? 3.12 x 1017 8. A battery has a rating of 1500 mA-Hr. The battery supplies 75 mA to an electric circuit. How long will the battery last? 20 Hr 9. Semiconductors exhibit characteristics
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My research is to determine if electricity moves better through thick wires or through thin wires. For this experiment I used two size D batteries‚ two flashlight bulbs‚ one 6.5 inch thin steel wool piece‚ one 6.5 inch thick steel wool piece‚ two 2 inch pieces of straw‚ and some electrical tape. Steel wool is a material made from thin fibers of steel made into a pad. (http://www.wisegeek.com/l-what-is-steel-wool.htm) There are many uses for steel wool. It can be used for sanding furniture‚ removing
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