An infinite number of concentric rings carry a charge Q each alternately positive and negative. Their radii are 1, 2, 4, 8 … metres in geometric progression as shown below:The potential at the centre is

\(\frac{Q}{{12\pi {\varepsilon _0}}}\)

\(\frac{Q}{{8\pi {\varepsilon _0}}}\)

\(\frac{Q}{{6\pi {\varepsilon _0}}}\)

An infinite number of concentric rings carry a charge Q each alternate

1.	An infinite number of concentric rings carry a charge Q each alternately positive and negative. Their radii are 1, 2, 4, 8 … metres in geometric progression as shown below:The potential at the centre is
A.	0
B.	\(\frac{Q}{{12\pi {\varepsilon _0}}}\)
C.	\(\frac{Q}{{8\pi {\varepsilon _0}}}\)
D.	\(\frac{Q}{{6\pi {\varepsilon _0}}}\)
Answer» E.

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An infinite number of concentric rings carry a charge Q each alternately positive and negative. Their radii are 1, 2, 4, 8 … metres in geometric progression as shown below:The potential at the centre is

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