1. A solid elemental dielectric with 3 × 1028 atoms/m3 shows an electronic polarizability of 10−40 F-m2. Assuming the internal electric field to be a Lorentz field, calculate the dielectric constant of the material.
(Set-3–Sept. 2007), (Set-1–May 2004), (Set-4–Nov. 2004), (Set-1–May 2003)
Sol: Number density of dielectric atoms, N = 3 × 1028/m3
Electronic polarizability, αe = 10−40 F-m2
Calculate the dielectric constant, ∈r = ?
2. A parallel plate capacitor has an area of 100 cm2, a plate separation of 1 cm and is charged to a potential of 100 V. Calculate the capacitance of the capacitor and the charge on the plates ...