Engineering Physics

Solved Problems

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, α_e = 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 ...