Summary The objective of this experiment was to learn how to read different meters like the D.C. volt meter and the D.C. amperes meter. In all meters each big line is a major division and each little line in between is a minor division‚ and if there is a line smaller than the minor division lines then that would be a sub minor division. Each meter has a low‚ medium‚ and high range. For example on the D.C. volt meter the ranges go from top to bottom 150‚ 15‚ and 3.0. But on the D.C. ampere meter the ranges
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(A) and electrical resistivity (ρ) and volt‚ (V). II Procedure: Apparatus: DC power supply‚ milliammeters and ammeters‚ voltmeters‚ SPST switch‚ a “fused” connector‚ a 2-meter slide wire resistance‚ and mounted resistance spools. Variation of V and I‚ with R held constant 1 Connect the apparatus as shown in the Figure below‚ attaching the voltmeter last. Figure 1 2 Set the power to 4 volts. To begin with‚ set the voltmeter on the 0-5 volt rang and the milliammeter on the 0-1000
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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 take to power the LED? Is there a certain voltage and/or current
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then make the electromagnet stronger. Variables: Independent The independent variable which we can control is the amount of voltage we put through the electromagnet. In this case we have to change the amount of voltage to 2‚ 4‚ 6‚ 8‚ 10 and 12 volts. Dependant The dependant variable is the amount of paper clips that will cling to the electromagnet. Controlled The controlled variable is making sure that it is a fair test by having the same amount of coils‚ the same nail‚ the same paper
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Name _____________________ Battery‚ resistance‚ and current – Lab 17 Go to http://phet.colorado.edu/en/simulation/battery-resistor-circuit and click on Run Now. Batteries‚ Resistance and Current “Battery-Resistor”: Check “show battery” and “show cores”‚ watch what happens‚ adjust some variables 1. Why do electrons (blue dots) move? Draw a diagram of the battery‚ label the flow of electrons. The flow of current (+) is opposite; draw this and note if toward or away from + terminal
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apparatus as shown in the Diagram: 2. Cut wires to the following lengths: · 30cm · 60cm · 90cm · 120cm · 150cm 3. Attach the wire to the crocodile-clip leads and set voltage to 5 volts or 1.5 Volts 4. Take the reading from the ammeter and record in results table. 5. Repeat 4 times for each length of wire and find the
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AIM- OUR AIM WAS TO FIND OUT WHICH VARIABLES AFFECT RESISTANCE‚ AND WHICH ONE HAS THE GREATEST EFFECT. BACKGROUND INFORMATION: Resistance is the force that opposes the flow of electrons in a circuit. The equation for resistance is Ω=V/A. (Ohms equals Voltage divided by amps). Resistivity is a measure of how strongly a material opposes the flow of electrical current‚ There are four main factors that affect resistance: Length – this is because the electrons would bump into more atoms‚ the longer
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Thevenin Theorem It provides a mathematical technique for replacing for a given network‚ as viewed from two output terminals by a single voltage source with a series resistance. It makes the solution of complicated networks (particularly‚ electronic networks) quite quick and easy. The Thevenin’s theorem‚ as applied to d.c. circuits‚ may be stated as under: The current flowing through a load resistance RL connected across any two terminals A and B of a linear‚ active bilateral network is given
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used the graph in tetanus to calculate the speed of contraction and relaxation. Fourth‚ we rotated the femur clamp to adjust the muscle length and looked at the changed in response in volts‚ and found out the optimal length. In result‚ we found out the threshold voltage is about 0.2 volts and the plateau is at 2.2 volts‚ the summation started at 16Hz‚ and it reached tetanus at 64Hz‚ for the optimal length‚ we did not get enough time to finish it‚ and it should be somewhere higher then 35 mm. Introduction:
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Carrying Capacity of the cable (Iz): ...................................................... 3 Correct Cable Size: ................................................................................................ 3 Volt drop (Vd): ...................................................................................................... 4 Result ...............................................................................................................
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