A thin copper ring of radius a is charged with q units of electricity. Calculate the electric field at a point at a distance x from the centre and on the axis of the ring. Use the result to find the electirc field due to a charged disc of surface density of charge epsilon.

A thin copper ring of radius a is charged with q units of electricity.

1.	A thin copper ring of radius a is charged with q units of electricity. Calculate the electric field at a point at a distance x from the centre and on the axis of the ring. Use the result to find the electirc field due to a charged disc of surface density of charge epsilon.
Answer» ANSWER :`E=1/(4piepsi_0)*(QX)/(a^2+x^2)^(3//2);E=sigma/(2epsi_0)(1-x/(SQRT(a2=x^2)))`

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A thin copper ring of radius a is charged with q units of electricity. Calculate the electric field at a point at a distance x from the centre and on the axis of the ring. Use the result to find the electirc field due to a charged disc of surface density of charge epsilon.

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