Assuming That the Drift Velocity in a Wire of with Cross

question 1

Multiple Choice

Assuming that the drift velocity in a wire of with cross sectional area 69 mm² is 4.12 * 10^-8 m/s and the current in the wire is current I = 30 mA,what is the density of electrons in the wire?

• A)0.812 * 10²⁹ electrons per m³
• B)0.845 * 10²⁹ electrons per m³
• C)0.702 * 10²⁹ electrons per m³
• D)0.756 * 10²⁹ electrons per m³
• E)0.660 * 10²⁹ electrons per m³

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