My son is doing a science experiment on how varying temperature and diameter of wire impacts the resistance we are assuming we can accomplish this by using different gauge wires, a home thermometer, and a basic digital multimeter (eg this one at amazon . The amount of electric current that flows through the body determines various effects of an electric shock as listed in table table1, 1 , various amounts of current produce certain effects most current-related effects result from heating of tissues and stimulation of muscles and nerves. The goal of this lab is to allow students to discover the effect that temperature has on resistance in this experiment, students build the circuit shown in figure 1 and use the voltmeter (v) and ammeter (a) readings to determine the resistance at different temperatures, which are measured. We will use steam generator to perform our experiment to heat the wire and we use the calorimeter to cool the wire then we will use ohmmeter to measure the resistance of the wires we will perform (3) three trials with different hot temperature and (3) three trials for different cold temperature.
In effect, the two different positions of the conductor relative to the movement act as two different range resistors in a direct-connection style of ammeter review: an ideal ammeter has zero resistance. Preet kaur: physics report- resistance myp5 ib uploaded by resistance 4 there are five factors that determine the resistance of the conductor: - diameter: large conductors allow more current flow and less voltage, that means less resistance and thin conductors allow less current flow and thus more resistance step one: cut two wires. Step 12: using readings from voltmeter and ammeter, calculate the resistance for each output value using equation derived from ohm‟s law: r= (ω) step 11: assemble a similar circuit,this time replacing wire of cross sectional area 0001 with wires of cross sectional area 0004 step 12: repeat steps 7 through 10 for second set of wires ( step. On this agar plate, a bacterial isolate is tested for resistance to each of twelve different antibiotics the clear zones around each disc are the zones of inhibition that indicate the extent of the test organism’s inability to survive in the presence of the test antibiotic.
- factors affecting the resistance of a wire the aim of this experiment is to investigate one factor that affect the resistance of a wire i will do this by performing an experiment first i will need to identify the factors that effect resistance. Physics 111 laboratory experiment #3 current, voltage and resistance in series and parallel circuits this experiment is designed to investigate the relationship between current and potential in determining the resistance of a resistor. Household circuits are often wired with two different widths of wires: 12-gauge and 14-gauge the 12-gauge wire has a diameter of 1/12 inch while the 14-gauge wire has a diameter of 1/14 inch thus, 12-gauge wire has a wider cross section than 14-gauge wire. A simple investigation of the factors affecting the resistance of a wire. The effect of zno nanoparticle coating on the frictional resistance between orthodontic wires and ceramic brackets it is always necessary to carry out experimental tribometery tests to evaluate the effect of different factors on friction more meticulous studies are needed to determine the long-term effects on various tissues in the.
Episode 121: emf and internal resistance the starting point for the theory can be either kirchhoff’s second law or conservation of energy in the circuit (the same thing really) but a general discussion based on the circuit diagram below should use a variety of approaches. Resistance of a wire task the resistance of a wire depends on factors, one of which is the length of the constanton wire, i will be investigating this into more detail. Any heating effect which may change the resistivity record the readings on the ammeter and voltmeter for 8 different lengths complete a table as below and calculate the resistance of the wire for each length. Best answer: basically, you want to read about resistivity this is very different from normal resistance because it is constant, with any length of wire this is the way you should improve your experiment by extending it, try calculating the resistivity of your wire you can then use this to calculate a.
Class praticals determining resistance from measurements of potential difference (pd) and current repeat the experiment and calculate its resistance series of experiments should give students practice in taking a pair of current and potential difference readings for various components so that the resistance of the component can be. Factors affecting resistancereported by: ralph lery guerrero kevin roxas marco lauro delos santos factors affecting resistance 1 diameter (cross-sectional area) r1/r2=d22/d12some connecting wires are made of stranded thin wiresstranding wires has the same effect as increasing cross-sectional areathe wire’s gauge number specifies. 3 resistance ohm’s law v = i x r (volts = current x resistance) the ohm (ω) is a unit of electrical resistance equal to that of a conductor in which a current of one ampere is produced by a potential of one volt across its terminals. This limits the current through the wire in order to reduce any heating effect which may change the resistivity record the readings on the ammeter and voltmeter for 8 different lengths complete a table a suitable table and calculate the resistance of the wire for each length.
Investigating the effect of length on resistance is common but some students may wish to investigate the effect of the thickness of wire in either case, different wires should be made of the same material. Four factors affecting resistance posted on october 3, 2010 october 3, 2010 by john vagabond some old-fashioned electrical components resistance is a property of a device or a component like a lamp, a resistor, a thermistor, a diode and so on its value depends on four things 1 what it’s made of. For example, when the length of the wire is 20cm the resistance is 314 ohms when the length of the wire is 40cm the resistance is 618 ohms, which is roughly double in my main investigation i will see if this observation applies to my results.