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Question: The diameter of each plate of an air capacitor is 4 cm. To make the capacity of this plate capacitor...

The diameter of each plate of an air capacitor is 4 cm. To make the capacity of this plate capacitor equal to that of 20 cm diameter sphere, the distance between the plates will be

A

4×10−3 m4 \times 10 ^ { - 3 } \mathrm {~m}

B

1×10−3m1 \times 10 ^ { - 3 } m

C

1 cm

D

1×10−3 cm1 \times 10 ^ { - 3 } \mathrm {~cm}

Answer

1×10−3m1 \times 10 ^ { - 3 } m

Explanation

Solution

According to the question ε0Ad=4πε0R\frac { \varepsilon _ { 0 } A } { d } = 4 \pi \varepsilon _ { 0 } R

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