Physics GCSE coursework: Resistance of wire Aim: To investigate if the length of wire affects its resistance. Prediction (Hypothesis): I predict that the longer the wire the higher the resistance‚ and the shorter the wire the lower the resistance. Knowledge: Resistance is that property of electric components that turn electric energy into heat in opposing the passing of an electric current.It can be beneficial‚ as in electric heaters‚ or a pest‚ as in light bulbs‚ where the heat
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production of transformers‚ any output voltage that exceeds 120 ± 30 volts is unacceptable to the customer. Exceeding these limits results in an estimated loss of $300. However‚ the manufacturer can adjust the voltage in the plant by changing a resistor thatcosts $2.25. a. Determine the Taguchi loss function. b. Suppose the nominal specification is 120 volts. At what tolerance should
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deliver more than 500 mV when the temperature is higher than 50ºC ‚ but it is useless since the conditioning system has a ceiling temperature of 50ºC beyond which sticks displaying as if it was 50ºC. It has a RC damper of 1uA capacitance and 100Ω resistor connected from output to ground to improve capacitance tolerance as advised in its datasheet. [1] The LM35 has a possible deviation of up to 1.25ºC in our range (0-50ºC) as stated in its datasheet that cannot be avoided and would affect the accuracy
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the amplifier is running on low volume. At low volume less heat will be dissipated and it will not trigger the cooler fan ON. The temperature is sensed using an NTC (negative temperature coefficient) thermistor R2. Junction of thermistor r2 and resistor R1 is connected to the inverting input (pin3) of IC1 which is wired as a comparator. The non-inverting input (pin2) is given with a reference voltage using the preset R3. As temperature increases the resistance of NTC thermistor will drop and so
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How does the length of a wire affect its resistance? Introduction: This first report in Physics will show the investigation of how the length of a wire affects its resistance. For starters I will go through the main definitions‚ to get a better knowledge of what is going to happen. However I will plan it out first to show each step of how I started‚ and then go into detail about the results and what the investigation on a whole has showed me. I shall then conclude my findings and present them with
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according to the rate of change‚ so if the material is moving slowly then no electricity will be detected. Knowing this we can find the natural frequency of this strip with a weight on the end. Exercise 3: Potentiometers are user as variable resistors. Knowing that‚ we can take resistance values at given angles‚ then use those to find angles in between. A critical step in this exercise is to guess the angle as close to its true value as you can. After you have found your values you can use those
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scientists would yield inaccurate results. Ohm’s Law states that voltage (V) is equal to the amount of current (I) multiplied by a constant resistance (R) in a DC circuit to give the equation . In a gel electrophoresis set up‚ the gel itself acts as the resistor. Various materials have their own various resistivity values (ρ)‚ which is an inherent property of the material and therefore remains constant as long as the material remains constant. Resistivity can be used to calculate the resistance of a material
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The Greenlee Non-Contact Voltage Detector capabilities a chronic self-check feature‚ assessing the tester’s entire functionality. It detects voltage in the range of 50V-1000V and alerts you to the presence of voltage with vivid LEDs and audible alarm. For an adjustable voltage tester with a five to a thousand volt variety check out the Greenlee GT-sixteen Adjustable Non-Contact Voltage Detector. Features For over a century and a half‚ Greenlee‚ a Textron agency‚ has been a purveyor of high fine
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1. My hypothesis is that the resistance decreases as the temperature increases. I predict my results will have a negative correlation‚ and that as the temperature 2. http://www.gcsesciencemethods.co.uk/2014/05/thermistor-resistance-dependent-on.html http://www.nuffieldfoundation.org/practical-physics/effect-temperature-thermistor The first method contained a risk assessment as well as a choice of two methods‚ one with a digital multimeter as well as one with a power supply and an ammeter.
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Series and Parallel Circuits Name: Angelica Castro Directions: 1. Go to the following website: http://phet.colorado.edu/en/simulation/circuit-construction-kit-ac-virtual-lab 2. Click “Run now.” You now have the raw material to create a circuit. Take a moment to look over the site and find all the different materials. To build a circuit you will need several wires‚ a light bulb‚ a voltage source‚ a voltmeter‚ and a non – contact ammeter. Play with it to see how to grab and manipulate
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