AIEEE 2007 | Capacitor Question 150 | Physics

A parallel plate condenser with a dielectric of dielectric constant $$K$$ between the plates has a capacity $$C$$ and is charged to a potential $$V$$ volt. The dielectric slab is slowly removed from between the plates and then reinserted. The net work done by the system in this process is

zero

$${1 \over 2}\,\left( {K - 1} \right)\,C{V^2}$$

$${{C{V^2}\left( {K - 1} \right)} \over K}$$

$$\left( {K - 1} \right)\,C{V^2}$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

A parallel plate capacitor is made by stacking $$n$$ equally spaced plates connected alternatively. If the capacitance between any two adjacent plates is $$'C'$$ then the resultant capacitance is

$$\left( {n + 1} \right)C$$

$$\left( {n - 1} \right)C$$

$$nC$$

$$C$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

A fully charged capacitor has a capacitance $$'C'$$. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity $$'s'$$ and mass $$'m'.$$ If the temperature of the block is raised by $$'\Delta T',$$ the potential difference $$'v'$$ across the capacitance is

$${{mCAT} \over s}$$

$$\sqrt {{{2mCAT} \over s}} $$

$$\sqrt {{{2msAT} \over C}} $$

$${{ms\Delta T} \over C}$$

AIEEE 2003

MCQ (Single Correct Answer)

-1

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

decreases

remains unchanged

becomes infinite

increases