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Concepts Of Physics MCQ Edition [Volume 2]PhysicsCapacitors

If the aforementioned capacitor is connected across a 6.0 V battery, determine the induced charge on the dielectric.

Options

  1. A6.4 nC
  2. B2.1 nC
  3. C8.5 nC
  4. D12.8 nC

Correct answer

C. 8.5 nC

Step-by-step solution

The induced charge on the dielectric is given by the formula: q_ ind = Q (1 - 1 K ) where Q is the total charge on the capacitor plates and K is the dielectric constant of the material. When the capacitor is connected across a battery of voltage V , the charge on the plates with the dielectric inserted is: Q = K C₀ V Substituting this into the induced charge formula, we get: q_ ind = K C₀ V (1 - 1 K ) = C₀ V (K - 1) Based on standard problem parameters (e.g., a parallel plate capacitor with area A = 400 cm ^2 , sep

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