A current of 10A exists in a wire of cross-sectional area 5mm2. The drift velocity of the electrons is 2×10−3m/s. The number of free electrons in each cubic meter of the wire are :
A
1×1023
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B
2×106
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C
2×1025
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D
625×1025
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Solution
The correct option is D625×1025 Current through a wire is given by,