7. The resistance of a wire can be expressed in terms of its resistivity, p: L...

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7. The resistance of a wire can be expressed in terms of its resistivity, p: L R = PA Where L is the length of the wire, and A is the cross sectional area of the wire. Using the value of the resistance that you obtained from your plot, and L=2.1 m with a radius of r = 0.5 mm, calculate the resistivity of this wire. Show your work. Using your calculated value of the resistivity for this wire, consult the table below to determine the material the wire is made of. Calculate a percent difference between your value and the given value. Show your work. Material Silver Copper Brass Nickel Iron Steel Constantan Nichrome p(22.m) 1.59 x 10-8 1.67 x 10-8 ~7 x 10-8 7.8 x 10-8 9.71 x 10-8 ~1.1 x 10-7 4.9 x 10-7 1.08 x 10-6 Y X Potentisl (V) Current (A) 0.53 1.06 2 AN 4 6 8 10 1.6 2.13 2.66 Potential in Volts (V) 12 10 0 0.5 Potential vs. Current 1 1.5 Current in Ampere (A) y-3.7523x+0.0113 2 2.5 7. The resistance of a wire can be expressed in terms of its resistivity, p: L R = PA Where L is the length of the wire, and A is the cross sectional area of the wire. Using the value of the resistance that you obtained from your plot, and L=2.1 m with a radius of r = 0.5 mm, calculate the resistivity of this wire. Show your work. Using your calculated value of the resistivity for this wire, consult the table below to determine the material the wire is made of. Calculate a percent difference between your value and the given value. Show your work. Material Silver Copper Brass Nickel Iron Steel Constantan Nichrome p(22.m) 1.59 x 10-8 1.67 x 10-8 ~7 x 10-8 7.8 x 10-8 9.71 x 10-8 ~1.1 x 10-7 4.9 x 10-7 1.08 x 10-6 Y X Potentisl (V) Current (A) 0.53 1.06 2 AN 4 6 8 10 1.6 2.13 2.66 Potential in Volts (V) 12 10 0 0.5 Potential vs. Current 1 1.5 Current in Ampere (A) y-3.7523x+0.0113 2 2.5