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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
What will be the capacity of a parallel-plate capacitor when the half of parallel space between the plates is filled by a material of dielectric constant ${\varepsilon _r}$ ? Assume that the capacity of the capacitor in air is $C$
  • A
    $\frac{{2{\varepsilon _r}C}}{{1 + {\varepsilon _r}}}$
  • ✓
    $\frac{{C({\varepsilon _r} + 1)}}{2}$
  • C
    $\frac{{{\varepsilon _r}C}}{{1 + {\varepsilon _r}}}$
  • D
    ${\varepsilon _r}C$
✓

Answer

Correct option: B.
$\frac{{C({\varepsilon _r} + 1)}}{2}$
b

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