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There are three conducting concentric sp...

There are three conducting concentric spherical shells having charges Q, -Q, 2Q respectively as shown in the figure. The electric field intensity at point P is (where OP= 2.5R) (`k= 1/(4π epsilon_0) `)

A

zero

B

`3/4(kQ)/R^2`

C

`4kQ/(25R^2) `

D

`kQ/(4R^2) `

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