A. Planning Plan of the method to be employ: - The electrical resistance of nichrome buttocks be determined using the equating ??=?RA/L Where: R:- Is the resistance of the telegraphical record in ?ohms and wad be determined using the equation R=V/I where V is voltage in volts and I is ongoing in amperes. L:- Is the duration of the nichrome conducting wire used in metres. A:- Is the cross-sectional area of the wire in metres fledge and can be determined using the equation A= ??d2 where d is the diameter of the wire. If I plot 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 passing done 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 found by knowing it´s diameter. Therefore the resistivity of nichrome can be calculated. ? Diagram of the circuit used in this try disc eptation of the apparatus used: - 1- Power pack depict of 4V 2-A unsettled resistor 3-A full scale deflection ammeter with a quantity lam 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 enlarge method: - I set up the circuit as shown in the diagram that I have drawn. I started the try out by taping a meter ruler mingled with the terminal blocks P, Q so that I could mea trusted 100cm of nichrome wire.I made current that the wire was carefully tightened at both terminals to try to co nstitute down the kinks or twists in the wir! e. I then switched on the forcefulness pack... If you want to get a full essay, purchase order it on our website:
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