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Question:

rewarning
rewarning
Student
High School - 10th Grade

A sphere with radius R=20mm is loaded till a potential V=-2KV. Find the weight of all electrons transferred to sphere, in the loading process.

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Posted by rewarning on Monday June 29, 2009 at 5:11 AM and tagged with electron, potential, science, weight.

Answers:

  1. giorgiana1976
    giorgiana1976 Teacher
    Doctorate

    eNotes Editor

    The number of electrons and their weight:

    N=Q/(-e),m=N*me=[Q/(-e)]*me (1)

    We ahve to say it again that inside a sphere , the field and the potential are as the load would be concentrated in the center of sphere.

    V=Q/(4*pi*epsilon*r)

    E= Q/(4*pi*epsilon*r^2)

    In particular, the potential of the sphere itself:

    V=Q/(4*pi*epsilon*R), R=r

    We'll draw out the load from this formula and we'll introduce it in (1):

    Q=4*pi*epsilon*R*V,

    m=(4*pi*epsilon*R*V*me)/(-e)=25

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    Posted by giorgiana1976 on Monday June 29, 2009 at 10:07 AM