Q2. (a) At a boundary between two dielectric materials having different dielectric constants,
show by means of a simple sketch that although lines of D are continuous, the
magnitude of D is generally different in the two materials. Show by means of
another sketch the special condition under which D has the same value in both
materials. [10]
(b) Compare the capacitances of two identical capacitors with dielectrics inserted and having dielectric constants Ki and K2, as shown in Fig below. [15 ]
Q3. (a) A source of emf causes a constant current i to flow through a resistance R.