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Grade 10Electrostatics

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

Profile image of Hrishant Goswami
12 Years agoGrade 10
Answers icon

2 Answers

Profile image of Aditi Chauhan
12 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

Profile image of NANCY WILSON
7 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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