The number of free electrons per 100 mm of ordinary copper wire is Average drift speed of electrons is 0.25mm . The current flowing is |
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a) |
8 A |
b) |
0.8 A |
c) |
80 A |
d) |
5 A |

The number of free electrons per 100 mm of ordinary copper wire is Average drift speed of electrons is 0.25mm . The current flowing is |
|||||||

a) |
8 A |
b) |
0.8 A |
c) |
80 A |
d) |
5 A |

1 Answer

127 votes

Drift velocity, Where I is current, n the number of electrons, e the electron charge and A the area of cross-section of wire. Number of electrons per unit volume So, current in the wire =0.8A |

127 votes

127