rubber band 3 A penny 4 A (a) Assuming a resistivity of 1 ohm (c) WARNING! Do no

Question

rubber band 3 A penny 4 A (a) Assuming a resistivity of 1 ohm (c) WARNING! Do not try this at home! What is the expected currentthat each would carry if it were connected across a 111-V power supply? rubber band 3 A penny 4 A x Your answer differs from the correct answerby orders of magnitude. ohm (b) Calculate the resistance between the 'heads' and 'tails' sidesof a penny that is 1 mm thick and 2 cm in diameter. 2x Your answer differs from the correct answerby 10% to 100%. ohmm,calculate the resistance between the ends of a rubber band that is18 cm long and 1.1 mm in diameter. 1 1013

Explanation / Answer

   we are given that     = 1 x 1013 .m    to get the resistance we use    R = l / A    A = r2 (a)    l = 18 cm      = ......... m    d = 1.1 mm    r = 0.55 mm      = ......... m    R = .......... (b)    in the similsr manner as in part (a)calculate the resistance in this case (c)    V = 111 V    using ohms law    V = I R    solve for the current in both thecases

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