> Q. A silver wire of radius $ 0.1text{ }cm $ carries a current of $ 2A $ . If the charge density in silver is $ 5.86times {{10}^{28}}{{m}^{-3}}, $ the drift velocity is – LIVE ANSWER TODAY

Q. A silver wire of radius $ 0.1text{ }cm $ carries a current of $ 2A $ . If the charge density in silver is $ 5.86times {{10}^{28}}{{m}^{-3}}, $ the drift velocity is

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A silver wire of radius $ 0.1text{ }cm $ carries a current of $ 2A $ . If the charge density in silver is $ 5.86times {{10}^{28}}{{m}^{-3}}, $ the drift velocity is

Solution:

$ {{v}_{d}}=frac{I}{pi Ae} $

Given, $ I=2A,,,n=5.86times {{10}^{28}}{{m}^{-3}}, $

$ A=pi {{r}^{2}}=pi {{(0.1times {{10}^{-2}})}^{2}},e=1.6times {{10}^{-19}}C $

$ therefore $ $ {{v}_{d}}=0.68times {{10}^{-4}}m/s $

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