Phy Lab 7

# Phy Lab 7 - 7.2.2 Resistance as a function of Area 1 2 3...

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7.2.2 Resistance as a function of Area 1. 2. 3. The relationship that yields an approximately linear relationship is the one where the inverse of the cross-sectional area is taken. Thus the relationship between R and A is inversely related. 7.2.3 Exercise If the wire is stretched then that means that the cross-sectional area is decreases. This means that the inverse of the area is going to be larger, thus affecting the resistance, which will be larger also. 7.3.2 Current as a Function of Resistance 1. 2. 3. By analyzing both functions it is possible to determine that the relationship that exist between I and R is that they are inversely related. 7.4.1 A Series Circuit 1. I’ = V/(R 1 +R 2 +R 3 ) I’ = 12.15V/(103.5 +200 +304 ) I’=0.02A=20mA V i ’ = I’R i V 1 ’=(0.02A)(103.5 )=2.07V V 2 ’=4V V 3 ’=6.08V 2. Percent differences (abs(I-I’)/I’) x 100% (abs( 20mA-20mA)/20mA)x100%=0% Percent difference. (abs(V i - V i ’)/ V i ’)x100% V 1 =(abs(2.06-2.07)/2.07)x100%=0.48%

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Phy Lab 7 - 7.2.2 Resistance as a function of Area 1 2 3...

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