Resistance of a Wire

A. Planning Plan of the method to be affiance: - The resistivity of nichrome buttocks be de endpointined victimisation the equality ??=?RA/L Where: R:- Is the resistance of the cable in ?ohms and discount be determined using the equating R=V/I where V is voltage in volts and I is current in amperes. L:- Is the succession of the nichrome conducting cable utilise in metres. A:- Is the cross-sectional area of the wire in metres square and can buoy be determined using the equation A= ??d2 where d is the diameter of the wire. If I spell a chart of distance 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 deprivation 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 represent by knowing it´s diameter. Therefore the resistivity of nichrome can be calculated. ? Diagram of the circuit apply in this try List of the apparatus used: - 1- Power pack present of 4V 2-A variable resistor 3-A full master deflection ammeter with a amount 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 dress up 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 convinced(predicate) that the wire was carefully tightened at both terminals to try to mutation down the kinks or twists in the wire. I then switched on the forcefulness pack... If you want to need a full essay, run it on our website: Ordercustompaper.com

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