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A solid metallic sphere has a charge +3Q. Concentric with this sphere is a conducting spherical shell having charge -Q.The radius of the sphere is a and that of the spherical shell is b(b>a).What is the electric field at a distance  R(a<R<b) from the centre

 

  • Option 1)

    \frac{Q}{2\pi \varepsilon _{0}R}

     

     

     

  • Option 2)

    \frac{3Q}{2\pi \varepsilon _{0}R}

  • Option 3)

    \frac{3Q}{4\pi \varepsilon _{0}R^{2}}

  • Option 4)

    \frac{4Q}{4\pi \varepsilon _{0}R^{2}}

 

Answers (1)


Option 1)

\frac{Q}{2\pi \varepsilon _{0}R}

 

 

 

Option 2)

\frac{3Q}{2\pi \varepsilon _{0}R}

Option 3)

\frac{3Q}{4\pi \varepsilon _{0}R^{2}}

Option 4)

\frac{4Q}{4\pi \varepsilon _{0}R^{2}}

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