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2. Electric potential and capacitance — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics2. Electric potential and capacitance1 Mark
MCQ
Three concentric metallic spherical shell $A, B$ and $C$ or radii $a, b$ and $c$ $(a < b < c)$ have surface charge densities $- \sigma , + \sigma ,$ and $- \sigma $ respectively. The potential of shell $A$ is :
  • A
    $(\sigma/ \varepsilon_0 ) [a + b - c]$
  • B
    $(\sigma/ \varepsilon_0 ) [a - b + c]$
  • ✓
    $(\sigma/ \varepsilon_0 ) [b - a - c]$
  • D
    none
✓

Answer

Correct option: C.
$(\sigma/ \varepsilon_0 ) [b - a - c]$
c

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