Ribbon type microphone has important characteristics of two faces. What are those two faces?

The process of magnetic recording is based on principle of

Impedance of loudspeaker is of the order of

The diameter of circular plastic coated CD disc is

Enclosure of a loudspeaker act as a

CD player reads recorded information from

In monochrome Television, the contrast is controlled by

In Television receiver, if the vertical sync is missing, the picture will

Which device would be the best aid in shorted track detection?

Which test equipment allows comparison between input and output signals?