In copper, each atom releases one electron. If a current of 1.1A is flowing in the copper wire of diameter 1mm then the drift velocity of electrons, will approximately be (density of copper =9×103Kgm−3 and its atomic weight =63).
0.1 mm/s
0.2 cm/s
0.2 mm/s
10.3 mm/s
A
0.2 mm/s
B
10.3 mm/s
C
0.1 mm/s
D
0.2 cm/s
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Solution
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Electron density n=NAρM=(6.023×1023)×(9×103)63×10−3=0.86×1029m−3
In copper, each atom releases one electron. If a current of 1.1A is flowing in the copper wire of diameter 1mm then the drift velocity of electrons, will approximately be (density of copper =9×103Kgm−3 and its atomic weight =63).
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Q2
Every atom makes one free electron in copper. If 1.1 ampere current is flowing in the wire of copper having 1mm diameter, then the drift velocity (approx) will be (density of copper = 9×103kg/m3 and atomic weight of copper = 63)
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Q3
Copper has one conduction electron per atom. Its density is 8.89g/m3 and its atomic mass is 63.54 g/mol. lf a copper wire of diameter 1.0 mm carries a current of 2.0 A. What is the drift speed of the electrons in the wire?
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Q4
Current is flowing with a current density J=480amp/cm2 in a copper wire. Assuming that each copper atom contribution one free electron and gives that Avogadro number=6.0×1023atoms/mole Density of copper =9.0g/cm3 .Atomic weight of copper =64g/mole Electronic charge =1.6×10−19 coulomb. The drift velocity of electrons is:
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Q5
A current of 1.34A exists in a copper wire of cross-section 1mm2. Assuming that each copper atom contributes one free electron, the drift speed of the free electrons in the wire will be: (Density of copper is 8990kg/m3, atomic mass is 63.50 and charge on electron is 1.6×10−19C)