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The electric current existing in a disch...

The electric current existing in a discharge tube is `2.0(mu)A.`How much charge is tarnsferred across a cross-section of the tube in 5 minutes ?

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The correct Answer is:
`(6.0xx10^(-4)C)`
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Knowledge Check

  • A long straight cable of length l is placed symmetrically along z-axis and has radius a(ltlt l). The cable consists of a thin wire and a co- axial conducting tube. An alternating current I(t) = I_(0) " sin " (2pi vt) . Flows down the central thin wire and returns along the co-axial conducting tube. the induced electric at a distance s from the wire inside the cable is E(s ,t) =mu_(0) I_(0) v " cos "(2pivt) In ((s)/(a)) hatk . (i) Calculate the displacement current density inside the cable. (ii) Integrate the displacement current density across the cross- section of the cable to find the total displacement current I^(d) . (iii) compare the conduction current I_(0) with the displacement current I_(0)^(d) .

    A
    `(2pi)/(lamda^(2))I_(0)ln((a)/(s))sin(2pi upsilont)hat(k)`
    B
    `(1)/(lamda^(2))I_(0)ln((a)/(s))sin(2pi upsilont)hat(k)`
    C
    `(pi)/(lamda^(2))I_(0)ln((a)/(s))sin(2pi upsilon t)hat(k)`
    D
    Zero

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