Question

Brass 0.032 inch Diameter L(cm) L/A(cm ) VIV 963.4 0.008 10.0 1927 0.015 2890 0.022 20.0 3854 0.029 5. Complete the chart. Show work. (10 points) 1.102 1.093 1.102 1.093 Cross-Sectional Area: 5.19x103cm V/I=R(Q) R(un) 0.0073 7260 0.0137 13723 0.0200 19964 0.0265 26532 6. In Excel, plot Resistance (un) vs Length/Area, and show the trendline on the graph. What are the units of the slope of this graph, and what physical quantity does it represent? (8 points)

Answer 1

A is given as 5.19X10^-3 area of crossection. L L/A 963.3911368 1926.782274 2890.17341 3853.564547 4816.955684 5780.346821 6743.737958 7707.129094 8670.520231 9633.911368 V 0.008 0.015 0.022 0.029 0.036 0.043 0.05 0.057 0.064 0.071 1.102 1.093 1.102 1.093 1.102 1.093 1.102 1.093 1.102 1.093 V/I=R(ohm) 0.007259528 0.013723696 0.019963702 0.026532479 0.032667877 0.039341263 0.045372051 0.052150046 0.058076225 0.064958829 R(micro ohm) 7259.528131 13723.69625 19963.70236 26532.47941 32667.87659 39341.26258 45372.05082 52150.04575 58076.22505 64958.82891 R(micro ohm) in question 7260 13723 19964 26532 32667 39341 45372 52150 58076 64959 35 40 50

A B C D E L/A cm-1 12000 10000 8000 6000 R (micro ohm) 7260 13723 19964 26532 32667 39341 45372 52150 58076 64959 L/A cm-1 963.3 1927 2890 3854 4817 5780 6744 7707 8671 9634 4000 2000 10000 20000 30000 40000 50000 60000 70000 L/Acm-1

Slope = m = e m = R Here m= 2 & RA I= RA. This is Resistivity - Units are rcm. > Resistance is directly related to the dength of a wire. Greature the length more the resistance. =) RX L