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प्रश्न
Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 1.0 × 10−7 m2 carrying a current of 1.5 A. Assume the density of conduction electrons to be 9 × 1028 m−3
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उत्तर
We know that drift velocity,
`V_d=I/(nAq)`
where I is the current, n is charge density, q is charge of electron and A is cross-section area.
`V_d=1.5/(9xx10^28xx1.0xx10^(-7)xx1.6xx10^(-19))`
`V_d=10.4xx10^(-4) "m/s"`
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संबंधित प्रश्न
Define the term drift velocity.
Define relaxation time of the free electrons drifting in a conductor. How is it related to the drift velocity of free electrons? Use this relation to deduce the expression for the electrical resistivity of the material.
Consider the following statements.
(A) Free-electron density is different in different metals.
(B) Free-electron density in a metal depends on temperature.
Seebeck Effect is caused _____________ .
The position-time relation of a particle moving along the x-axis is given by x = a - bt + ct2 where a, band c are positive numbers. The velocity-time graph of the particle is ______.
The drift velocity of a free electron inside a conductor is ______
Define relaxation time.
What is the average velocity acquired by free electrons in a conductor under the influence of an electric field called?
What does conductivity, denoted by \[\sigma\], measure?
Which expression gives current density in terms of free electron density, relaxation time, and electric field?
