Write the function of a transducer in communication system.

Define the term ‘quality factor’ of resonance in series LCR circuit. What is its S.I. unit?

A point charge +Q is placed in the vicinity of a conducting surface. Trace the field lines between the charge and the conducting surface.

For the same angle of incidence, the angle of refraction in two media A and B are and respectively. In which medium is the speed of light less?

Two metallic resistors are connected first in series and then in parallel across a d.c. supply. Plot of I – V graph is shown for the two cases. Which one represents a parallel combination of the resistors and why ?