If \(q_{ f }\) is the free charge on the capacitor plates and \(q_{ b }\) is the bound charge on the dielectric slab of …

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:

[JEE Main 2021, 25 Jul (Shift 2)]