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Sphere of inner radius a and outer radiu...

Sphere of inner radius a and outer radius b is made of `p` uniform resistivity find resistance between inner and outer surface

A

`(p)/(4pi) ((1)/(a)-(1)/(b))`

B

`(p)/(2pi) ((1)/(a)-(1)/(b))`

C

`(p)/(3pi) (2/(a)-(1)/(b))`

D

`(p)/(2pi) ((2)/(2a)-(1)/(b))`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • Statement-1 : A hollow metallic sphere of inner radius a and outer radius b has charge q at the centre. A negatively charged moves from inner surface outer surface. Then total work done will be zero. Statement-2: Potential is constant inside the metallic sphere.

    A
    Statement-1 is True, Statement-2 is True, Statement-2 is a cor.
    B
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    D
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  • A copper cylindrical tube has inner radius a and outer radius b. The resistivity is p. The resistance of . the cylinder between the two ends is

    A
    `(rhol)/(b^(2)-a^(2))`
    B
    `(rhol)/(2pi(b-a)`
    C
    `(rhol)/(pi(b^(2)-a^(2))`
    D
    `(pi(b^(2)-a^(2)))/(rhol)`

  • Space between tow concentric spheres of radii r_(1) and r_(2) such that r_(1) lt r_(2) is filled with a material of resistivity rho . Find the resistance between inner and outer surface of the material

    A
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    B
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    C
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    D
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