point of highest energy within the external circuit is closest to the __+__ ( +‚ - ) terminal. c. Use >‚ <‚ and = signs to compare the electric potential (V) at the four points of the circuit. VA VB VC VD 4) The role of a battery in an electrical circuit can be described in three different ways. First‚ it is the energy supply. Second‚ the energy supplied by the battery is required to do work upon the charge to move it against the electric field from the negative terminal to the positive
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circuit diagrams. 2. Write the formulae to calculate the effective resistances when resistors are connected (a) in series and (b) in parallel. 3. How is the total potential difference calculated across a combination of resistors in series? 4. Example 12.7 An electric lamp‚ whose resistance is 20 Ω‚ and a conductor of 4 Ω resistance are connected to a 6 V battery (Fig. 12.9). Calculate (a) the total resistance of the circuit‚ (b) the current through the circuit‚ and (c) the potential
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predicted and actual resistance in a circuit of resistor combinations in series and in parallel. Background: A resistor is an electrical component/device that has electrical resistance. Resistors can be used in electric circuits for protection of components‚ voltage division or current control. In an ideal resistor the resistance remains constant regardless of the applied voltage or current‚ or the rate of change in the current (Resistor‚ 2005‚ Wikipedia). Electrical resistance is a measure of the
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in volts and is represented by the symbol V. http://physics.tutorvista.com/electricityandmagnetism/ohmslaw.html Resistance ● Resistance is an electrical quantity that measures how the device or material reduces the electric current flow through it. Measured in ohms (Ω) and represented by R. https://www.google.com/search?q=resistance&espv=2&biw=1366&bih=667&source=lnms&tb m=isch&sa=X&ei=uRP3VJroO4mvyQSGvYHoBQ&ved=0CAYQ_AUoAQ#tbm=isch&q=resista nce+in+circuit&imgdii=_&imgrc=y9SFhM_QxcpFSM%253A%3BU8lmR34zQfgLRM%3Bhttp%
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A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit‚ one leg of which includes the unknown component. Its operation is similar to the original potentiometer. It was invented by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Wheatstone in 1843. One of the Wheatstone bridge’s initial uses was for the purpose of soils analysis and comparison.[1] -------------------------------------------------
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following: RESISTOR A resistor is a component of a circuit that resists the flow of electrical current. It has two terminals across which electricity must pass‚ and it is designed to drop the voltage of the current as it flows from one terminal to the other. Resistors are primarily used to create and maintain known safe currents within electrical components. Resistors are coated with paint or enamel‚ or covered in molded plastic to protect them. Because
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Electrical Components and Circuits Course: PHY101 Purpose: The purpose and objectives of this lab was to be able to draw completed electrical circuits using the correct symbols for selected electrical components‚ including batteries and diodes. Another focus was to calculate the proper resistance using Ohm’s law‚ use proper electrical currents and quantities‚ and lastly measure voltage and resistance in an electrical circuit using a multimeter. Materials:
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source. Ammeter A2 reads a current of 5.0 amperes. What is the current in the 5-ohm resistor? 1. 1.0 A 2. 1.8 A 3. 2.3 A 4. 4.0 A 1. Determine the equivalent resistance of the circuit. 2. Calculate the current measured by ammeter A1. [Show all work‚ including the equation and substitution with units. 3. Calculate the resistance of the unknown resistor‚ R. [Show all work‚ including the equation and substitution with units.] Base your answers to questions 5 through 7 on the information below
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Law is the relationship among electric current‚ resistance‚ and voltage. The principle is named after the German scientist George Simon Ohm." Webster’s Online Dictionary. I will be discussing the uses of Ohm’s Law and why it is so important in everyday electrical problems whether it be simple or not. It is everywhere and used by many whether they notice it or not. Ohms law states that current in amperes is equal to voltage divided by resistance. This form of ohms law is most useful for technicians
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processes. One of the latest areas to benefit from FEA technology is the E-coat paint process. E-coat paint provides for excellent corrosion resistance and is the first of several different protective paint layers applied to an automotive body. During the E-coat paint process‚ an entire automotive body is immersed in a liquid bath. By applying an electrical current‚ a thin paint film forms over all the surfaces in contact with the liquid‚ including those surfaces in recessed portions of the body
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