Assume that each atom of copper contributes one electron. If the current flowing through a copper wire of 1 mm diameter is 1.1 A, the drift velocity of electrons will be (density of Cu=9 g , atomic wt. of Cu=63) |
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a) |
b) |
0.5 |
c) |
0.1 |
d) |
0.2 |

Assume that each atom of copper contributes one electron. If the current flowing through a copper wire of 1 mm diameter is 1.1 A, the drift velocity of electrons will be (density of Cu=9 g , atomic wt. of Cu=63) |
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a) |
b) |
0.5 |
c) |
0.1 |
d) |
0.2 |

1 Answer

127 votes

When A is area of cross-section of wire, and n be number of free electrons per unit volume, then relation between electric current (i) and drift velocity ( ) is Number of atoms in 63 g of copper is equal to Avogadro’s number ie, Volume of 63 g copper Hence, drift velocity |

127 votes

127