If a Metallic Wire of Cross-Sectional Area 4

question 57

Multiple Choice

If a metallic wire of cross-sectional area 4.0 × 10−⁶ m² carries a current of 7.0 A and has a mobile charge density of 4.24 × 10²⁸ carriers/m³,what is the average drift velocity of the mobile charge carriers? (charge value = 1.6 × 10−¹⁹ C)

• A)1.8E+3 m/s
• B)1.7E+3 m/s
• C)4.1E-4 m/s
• D)2.6E-4 m/s
• E)7.0E-6 m/s

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