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How long does it take electrons to get from the car battery to the starting motor?...

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Physics

How long does it take electrons to get from the car battery tothe starting motor? Assume the current is 149 A and the electronstravel through copper wire with cross sectional area 36.3 mm2 andlength 82 cm . The mass density of copper is 8960 kg/m3 and themolar mass is 63.5 g/mol . Avogadro’s number is 6.022 × 1023 .Assume that each copper atom contributes one conduction electron.Answer in units of min.

Answer & Explanation Solved by verified expert
4.4 Ratings (993 Votes)
Current I through wire of cross section A is given by I n eA vd 1where n is number density of electron e is charge on electron A is area of cross    See Answer
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