(a Assuming a resistivity of 1 1013 m, calculate the resistance between the ends

Question

(a Assuming a resistivity of 1 1013 m, calculate the resistance between the ends of a rubber band that is 16 cm on 3.53710"17 and 2.4 mm in diameter. (b) Calculate the resistance between the 'heads' and 'tails' sides of a penny that is 1 mm thick and 2 cm in diameter. 3.13 10"13 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully.2 (c) WARNING! Do not try this at home! What is the expected current that each would carry if it were connected across a 118-V power supply? rubber band 3.34,10%(-16)., A penny 3.71*10 -12) X A

Explanation / Answer

b) Given,

r = d/2 = 1cm

Area, A = pi x r2 = pi x (0.01)2 = 3.14 x 10-4 m2

Resistance, R = 1.7 x 10-8 x 0.001/ (3.14 x 10-4)

So, Resistance, R= 5.4 x 10-8 ohm

c) I (penny) = 118/5.4 x 10-8 = 21.85 x 108 A

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