Question

The capacity of a spherical conductor is 1ìF. Then its diameter would be(1) 1.8 metre (2) 4 1.8 10 metre  (3) 3 1.8 10 metre  (4) 18 metre

Answer 1

. The capacity of a spherical conductor is 1ìF. Then its diameter would be(1) 1.8 metre (2) 4 1.8 10 metre  (3) 3 1.8 10 metre  (4) 18 metre

it's answer is 1.8 x 104 metre

Answer 2

Answer:

(2) 1.8 × 10^4 m

Explanation:

⇒ 4π∈R = 1цF

⇒ (2R)2π∈ = 1цF

• Here keeping 2R left side and shifting others to the right

⇒ (2R) = (1цF) ÷ (2π∈) = (1 × 10^-6) ÷ (2 × 3.14 × 8.85 × 10^-12)

⇒ (2R) = 17,992 m ≈ 18,000 m ≈ 18 km

• Now, we know D = 2R ≈ 18 km ≈ 1.8 × 10^4 metre

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