A. Planning Plan of the method to be employ: - The resistivity of nichrome buttocks be de frontierined utilise the study ??=?RA/L Where: R:- Is the resistance of the cable in ?ohms and bath be determined using the comparability R=V/I where V is voltage in volts and I is current in amperes. L:- Is the succession of the nichrome conducting outfit utilize in metres. A:- Is the cross-sectional area of the cable in metres square and rouse be determined using the equation A= ??d2 where d is the diameter of the wire. If I plat a graph of length on the x-axis against resistance on the y-axis. From the relation R = ? L /A which corresponds to the st. line equation ? y=mx the graph should be a st. line strait through the origin where m is the gradient of the st. line graph and corresponds to ?/A. Since the cross-sectional area of the wire can be entrap by knowing it´s diameter. Therefore the resistivity of nichrome can be calculated. ? Diagram of the circuit utilise in this try List of the apparatus used: - 1- Power pack countenance out of 4V 2-A variable resistor 3-A full outgo deflection ammeter with a measuring stick range of 0-1 A 4-A digital voltmeter with a measuring range of 0-5 V 5-P, Q represents term blocks.
6-Circuit wires 7-PQ=Nichrome wire 8-A meter ruler 9-Michrometer screw-gauge 10-Sellotape Detailed method: - I go by up the circuit as shown in the diagram that I have drawn. I started the essay by taping a meter ruler amongst the terminal blocks P, Q so that I could mea trusted 100cm of nichrome wire.I made for certain that the wire was carefully tightened at both terminals to try to bid down the kinks or twists in the wire. I then switched on the forcefulness pack... If you want to get a full essay, arrange it on our website:
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