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AP EAMCET202021 Sep 2020Evening ShiftPhysicsCapacitanceActual

Taking earth to be a metallic sphere, its capacity will approximately be

Options

  1. A(6.4 10^6 ~F )
  2. B(700 ~F )
  3. C(700 F )
  4. D(700 pF )

Correct answer

C. (700 F )

Step-by-step solution

Radius of earth, (R=6400 ~km =6.4 10^6 ~m ) Taking earth to be a metallic sphere, its capacitance is given as ( aligned C & =4 ₀ R= 1 9 10^9 6.4 10^6 & =0.7111 10⁻³ ~F =711.1 10⁻⁶ ~F & =711 F =700 F aligned )

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