Physics

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How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.8 µC?

  • Physics -

    Do you know the charge per electron?


    number*charge per electron= total charge

    solve for number.

  • Physics -

    i don't know what you mean about the charge of the electron? or what number do you times it by.

  • Physics -

    http://scienceworld.wolfram.com/physics/ElectronCharge.html

    number electrons= totalcharge/chargeperelectron

  • Physics -

    q=(n*e).....(i)
    where, q= charge,
    n=number,
    e= charge of an electron
    n=q/e....(i) (from equation i)
    given,q= +2.8mc= +2.8*10^-6 c
    we know, charge of an electron(e)=1.6*10^-19 c

    hence n= (2.8*10^-6)/(1.6*10^-19)
    = 1.75*10^13
    so, 1.75*10^13number of charges should ne removed.

  • Physics(last line:correction) -

    q=(n*e).....(i)
    where, q= charge,
    n=number,
    e= charge of an electron
    n=q/e....(i) (from equation i)
    given,q= +2.8mc= +2.8*10^-6 c
    we know, charge of an electron(e)=1.6*10^-19 c

    hence n= (2.8*10^-6)/(1.6*10^-19)
    = 1.75*10^13
    so, 1.75*10^13number of charges should be removed.

  • Physics -

    what? i don't get it. ISn't 1.72*10^3 the number of electrons for 2.7uC?

  • ÝÖíáÉ ÓÚÏÇä -

    ÏáßäÇ ÞÖíÈ ÈÞãÇÔ ÌÇÝ ÝÍãá ÔÍäÉ ÞíãÊåÇq=3.2*10 14-

  • Physics -

    1.5x10^13

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