Fundamentholfundamenthol
JEE Main2019Physics
Q.

Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm2,is v. If the electron density in copper is 9 ×1028/m3 the value of v in mm/s is close to (Take charge of electron to be =1.6 × 10–19C)

  1. A

    0.2

  2. B

    3

  3. C

    2

  4. D

    0.02

Solution

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