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The current (in ampere) through a copper...

The current (in ampere) through a copper wire having cross sectional area `2 mm^(2)` Given:
` E=8.5 xx 10^(-3) V/m`
`rho = 1.7 xx 10^(-8) ohm m`

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Knowledge Check

  • The workdone in increasing the length of a one metre long wire of cross - sectional area 1 m m^(2) through 1mm will be (Y=2xx10^(11)Nm^(-2)) :

    A
    `0.1J`
    B
    `5J`
    C
    `10J`
    D
    `250J`

  • 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`
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