Resistance Wire Lab Report
ABSTRACT Through this experiment, we need to study about the relationship between the power and length of resistance wire in the circuit. From the hypothesis, it states that the longer length of resistance wire, the higher the power dissipated in the resistance wire. So, there are varies of length of the wire had used, there are 0.2m, 0.4m, 0.6m, 0.8m, and 1.0m. The resistances we get after the calculation are 0.54Ω, 1.27Ω, 2.01Ω, 2.74Ω, and 3.47Ω respectively and the power are 0.049W, 0.114W, 0.181W, 0.247W, and 0.312W respectively. 1.0 INTRODUCTION The aim of this experiment is to determine how the power P generated in a section of resistance wire difference with its length l when the wire is connected to a power supply. In this experiment, nichrome wire …show more content…
Then, the voltmeter was set up in parallel to the nichrome wire in the circuit while the ammeter and nichrome wire were connected in series in the circuit. The ammeter reading was adjusted to 0.10 A by adjust the rheostat. After the rheostat was adjusted, the switch button was pressed to allow the current flow in the circuit. The results were recorded and the experiment had repeated. 2.3 PROCEDURE 1. The nichrome wire of 1.2m had measured by using a meter rule was connected to the circuit. 2. Power supply with emf value of 4.5 V was supplied to the circuit. 3. The rheostat which was connected to the circuit was then adjusted until 0.1 A with an ammeter. 4. The reading of the voltmeter was then recorded. 5. The experiment was repeated by using wire length of 0.2m, 0.4m, 0.6m, 0.8m, and 1.0m. 6. The results were recorded and tabulated as shown in Table 1. 7. The graph of resistance, R against the length of nichrome wire was plotted.
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