The carbon-granules microphone works on the principle of ...
The carbon-granules microphone works on the principle of change in
inductance
resistance
capacitance
voltage
Correct answer is B
No explanation has been provided for this answer.
The phenomenon of light bending round an obstacle is? ...
The function of the magnanese (IV) oxide in a leclanche cell is to ...
A satellite revolving around the earth is kept on its orbit by? ...
A man standing between two parallel mirrors in a barber's shop will see the following number of ...