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A current of 1.0 A exists in a copper wo...

A current of 1.0 A exists in a copper wore of cross-section `1.0mm^(2)`.Assuming one free electron per atonm calculate the drift speed of the free electrons in the wire.The density of copper is `9000kgm^(-3)`.

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To calculate the drift speed of free electrons in a copper wire, we can follow these steps: ### Step 1: Understand the given data - Current (I) = 1.0 A - Cross-sectional area (A) = 1.0 mm² = \(1.0 \times 10^{-6}\) m² - Density of copper (ρ) = 9000 kg/m³ - Atomic mass of copper (M) = 63.5 g/mol = \(63.5 \times 10^{-3}\) kg/mol - Charge of an electron (e) = \(1.6 \times 10^{-19}\) C ...
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An electric current of 16 A exists in a metal wire of cross section 10^(-6)"M"^(2) and length 1m. Assuming one free electron per atom. The drift speed of the free electron in the wire will be (0.00x)m//s. Find value of x. ("Density of metal"= 5xx10^(3)"kg"//"m"^(3), "atomic weight"=60)

Knowledge Check

  • An electric current of 16 A exists in a metal wire of cross section 10^(-6) m^(2) and length 1 m. Assuming one free electron per atom. The drift speed of the free electrons in the wire will be (Density of metal = 5 xx 10^(3) kg//m^(3) atomic weight = 60)

    A
    `5 xx 10^(-3) m//s`
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    `2 xx 10^(-3) m//s`
    C
    `4 xx10^(-3) m//s`
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  • A current of 10 A is maintained in a conductor of cross-section 1 cm^(2) . If the free electron density in the conductor is 9 xx 10^(28) m^(-3) , then drift velocity of free electrons is

    A
    `6.94 xx 10^(-6) m //s `
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  • A current 4.0 A exist in a wire of cross-sectional area 2.0 mm^(2) . If each cubic metre of the wire contains 12.0xx10^(28) free electrons, then the drift spped is

    A
    `2xx10^(-8) m//s`
    B
    `0.5xx10^(-3) m//s`
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    `1.04xx10^(-4) m//s`
    D
    None of these

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