NEET2011PhysicsCurrent ElectricityActual
A current of 5 A is passing through a metallic wire of cross-sectional area 4 10⁻⁶ ~m ^2 . If the density of charge carriers of the wire is 5 10²⁶ ~m ⁻³ , then the drift velocity of the electrons will be
Options
- A1 10^2 ~m / s
- B1.56 10⁻² ~m / s
- C1.56 10⁻³ ~m / s
- D1 10⁻² ~m / s
Correct answer
B. 1.56 10⁻² ~m / s
Step-by-step solution
Drift velocity, v_d= 1 n e A v_d= 5 (5 10²⁶ ) (1.6 10⁻¹⁹ ) (4 10⁻⁶ ) = 1 64 =1.56 10⁻² ~ms ⁻¹