Thread: Physics homework (new)

  1. #1
    Registered User Zeeshan's Avatar
    Join Date
    Oct 2001
    London, United Kingdom

    Angry Physics homework (new)


    The neutral hydrogen atom in its normal state behaves in some respects like an electric charge distribution which consists of a point positive charge of magnitude +e surrounded by a charge distribution of negative charge whose density is given by

    -p ( r) = C exp(-2 r / a )

    Here a is the Bohr radius, 0.53E-8 cm and C is a constant with the value required to make the total charge e.

    (a) What is the net electric charge inside a sphere of radius a?

    (ANS : 0.68e)

    please help & thanx in advance....

  2. #2
    Registered User axon's Avatar
    Join Date
    Feb 2003
    use gauss's law and integrate over area of shell...get the E field and find the charge.


    some entropy with that sink?

    there are two cardinal sins from which all others spring: Impatience and Laziness. - franz kafka

  3. #3
    Registered User
    Join Date
    Oct 2003
    I guess you need to know where inside that sphere the nucleus of the hydrogen atom is located.

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