An electric current of 16A exists in a metal wire of cross-section 10-6m2 and length 1m. Assuming one free electron per atom, the drift speed of the free electrons in the wire will be (Density of the metal  =5×103kg/m3 Atomic Weight  )__________

# An electric current of 16A exists in a metal wire of cross-section 10-6m2 and length 1m. Assuming one free electron per atom, the drift speed of the free electrons in the wire will be (Density of the metal  $=5×{10}^{3}\mathrm{kg}/{\mathrm{m}}^{3}$ Atomic Weight  )__________

1. A

$5×{10}^{-3}\mathrm{m}/\mathrm{s}$

2. B

$2×{10}^{-3}\mathrm{m}/\mathrm{s}$

3. C

$4×{10}^{-3}\mathrm{m}/\mathrm{s}$

4. D

$7.5×{10}^{-3}\mathrm{m}/\mathrm{s}$

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