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What length of a copper wire of cross-sectional area `0.01 mm^(2)` would be required to obtain a resistance of `1k Omega`? Resistivity of copper `=1.7xx10^(-8) Omega m`.

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What length of a copper wire of cross-sectional area 0.01 mm^2 will be needed to prepare a resistance of 1 kOmega ? Resistivity of copper = 1.7 xx 10^(-8) Omega m .

Calculate the electric field in a copper wire of cross-sectional area 2.0 mm^(2) carrying a current of 1 A. The resistivity of copper =1.7xx10^(-8) Omega m.

Knowledge Check

  • The electric field in the copper wire of area of cross - section 2mm^(2) carrying a current of 1A is (use resistivily of copper is 1.7 xx 10^(-8) Omegam)

    A
    `8.0 xx 10^(-2)Vm^(-1)`
    B
    `8.5 xx 10^(-2)V//m`
    C
    `8.0 xx 10^(-3)V//m`
    D
    `8.0 xx 10^(-4)V//m`

  • A nichrome wire of length 100 cm and area of cross-section 0.5 m m^(2) has a resistance of 2.2 Omega . The resistivity of nichrome is

    A
    `110Omega`
    B
    `0.11Omega m`
    C
    `121Omega m`
    D
    `11xx10^(-7) Omega m`

    • Similar Questions

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    Calculate the electric field in a copper wire of cross-sectional area 2.0mm^(2) carrying a current of 1A .The resistivity of copper =1.7xx10^(-8)(Omega)m .

    Calculate the electric field in a copper wire of cross-sectional area 2.0 mm square carrying a current of 2 A. The resistivity of copper is 1.7 xx 10^(-8)Omega m .

    Find the resistance of a copper coil of total wire-length 10m and area of cross section 1.0mm^(2). What would be the resistance of a similar coil of aluminium? The resistivity of copper =1.7xx10^(-8)(Omega)m and that of aluminium 2.6xx10^(-8)(Omega).

    A bulb with rating 250V, 100W is connected to a power supply of 220 V situatd 10 m away using a copper wire of area of cross section 5 mm^2 . How much power will be consumed by the connecting wire? Resistivity of copper = 1.7 xx 10^(-8) Omegam .

    Calculate the resistance and electrical conductivity of a 2m long copper wire of cross sectional area 0.01 mm^2 . Givne resistivity of copper is 1.78xx10^(10) Omega m .

    A small insect crawls in the direction of electron drift along bare copper wire that carries a current of 2.56A. It travels with the drift speed of the electron in the wire of uniform cross-section area 1mm^2 Number of free electrons for copper = 8 times 10^28// cc and resistivity of copper = 1.6 times 10^-8 Omega m How much time would the insect take to crawl 1.0 cm if it crawls at the drift speed of the electron in the wire?

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