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Materials and Components

Q1: If a capacitor C having selectivity factor Q is scaled down in all its dimensions by a factor K without any altering the dielectric material, the new capacitor will have capacitance and selectivity as

A
C,

B
, Q

C
,

D C, K

ANS:B -

, Q

Since the dimension of plates is scaled down by K, the area decreases by a factor of K2, the distance between plates decreases by a factor of K. Therefore, capacitance changes to . The selectivity will not be affected.



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