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

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

  • Option 1)

    decreases

  • Option 2)

    remains unchanged

  • Option 3)

    becomes infinite

  • Option 4)

    increases.

 

Answers (2)

best_answer

As we learnt in

If metallic slab insert between the plates -

\dpi{100} {C}'=\frac{\epsilon _{0}A}{d-t}

- wherein

 

 

Aluminium is a good conductor. Its sheet introduced between the plates of a capacitor is of negligible thickness. The capacity remains unchanged

With air as dielectric, C= \frac{\varepsilon _{0}A}{d}

With\: \: space\: \: partially\: \: filled\: \: C{}'= \frac{\varepsilon _{0}A}{\left ( d-t \right )}= \frac{\varepsilon _{0}A}{d}= C


Option 1)

decreases

Incorrect

Option 2)

remains unchanged

Correct

Option 3)

becomes infinite

Incorrect

Option 4)

increases.

Incorrect

Posted by

Plabita

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