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JEE Main202125 Jul 2021Evening ShiftPhysicsCapacitanceActual

If q f is the free charge on the capacitor plates and q b is the bound charge on the dielectric slab of dielectric constant k placed between the capacitor plates, then bound charge q b can be expressed as :

Options

  1. Aq b = q f 1 - 1 k
  2. Bq b = q i 1 - 1 k
  3. Cq b = q f 1 + 1 k
  4. Dq b = q f 1 + 1 k

Correct answer

B. q b = q i 1 - 1 k

Step-by-step solution

When a dielectric is inserted in a capacitor, q b = q i 1 - 1 k

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