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The capacity of a parallel plate condenser is 10 m F when the distance between its plates is 8 cm. If the distance between the plates is reduced to 4 cm then the capacity of this parallel plate condenser will be (a) 5 u F (b) 10 u F (c) 20 u F (d) 40 u F



The capacity of a parallel plate condenser is 10 mF when the distance between its plates is 8 cm. If the distance between the plates is reduced to 4 cm then the capacity of this parallel plate condenser will be


        (a)    5 uF


        (b)    10 uF


        (c)    20 uF


        (d)    40 uF


Grade:10

2 Answers

Aditi Chauhan
askIITians Faculty 396 Points
10 years ago

(c)

C= 10 mF                    d = 8 cm

        C =?                         d’ = 4 cm

 

        If d is halved then C will be doubled.

Hence, C'' = 2C = 2 × 10 uF = 20 uF

NANCY WILSON
15 Points
5 years ago
in a parallel plate capacitor the distance between the plates is  d  and the potential difference across the plate is v . Energy stored per unit volume between the plates of capacitor is 

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