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Charge Q is applied to a circular disk of ebonite of radius a by rubbing it while it is rotating. In this way, the surface charge density becomes proportional to the radial distance from the centre. Show that the electric field strength on the axis of the disk at an axial distance h from the centre is given by

Charge Q is applied to a circular disk of ebonite of radius a by rubbing it while it is rotating. In this way, the surface charge density becomes proportional to the radial distance from the centre. Show that the electric field strength on the axis of the disk at an axial distance h from the centre is given by

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2 Answers

Sher Mohammad IIT Delhi
askIITians Faculty 174 Points
6 years ago
Use the simple basic laws of electrostatic, like gauss, law use it on a very small element and then integrate all over.

sher mohammad
b.tech, iit delhi
faculty askiitians
Thushara
13 Points
4 years ago
Charge Q is applied to a circular disk of ebonite of radius a by rubbing it while it is rotating. In
this way the surface charge density becomes proportional to the radial distance from the
center. Show that the electric field strength on the axis of the disk at an axial distance ℎ from

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