A parallel plate capacitor with air between the plates has a capacitance of 10 pF. The capacitance, if the distance bgetween the plates is reduced by

Question

A parallel plate capacitor with air between the plates has a capacitance of 10 pF. The capacitance, if the distance bgetween the plates is reduced by

A parallel plate capacitor with air between the plates has a capacitance of 10 pF. The capacitance, if the distance bgetween the plates is reduced by half and the space between tehm is filled with a substance of dielectric constant 4 is
A. `80 pF`
B. `96pF`
C. `100 pF`
D. `120 pF`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
Here `C_(1) =(epsi_(0) A)/(d) = 10 pF" "…….(i)`
and `C_(2) = k(epsi_(0)A)/(d//2) = (4xx 2 epsi_(0)A)/(d) " "(because K = 4)`
` = 8 xx 10" "("using (i)")` .
= 80 pF

4 views Answered 2023-02-05 15:29