A microphone converts

A microphone is connected to a cathode ray oscilloscope. A loudspeaker giving a single note is switch on . The trace shown in the figure appears on the screen. Which of the following the softer but same frequency note of the given note ?

A microphone of cross sectional area 0.80 cm^2 is placed in front of a small speaker emitting 3.0 W of sound output. If the distance between the microphone and the speaker is 2.0 m how much energy falls on the microphone in 5.0 s?

According to law of conservation of energy. "Energy can neither be created nor be destroyed, but can be changed from one form to another form". The sound energy in a microphone changes into

A microphone which converts sound into electrical signal is an example of "…………….." .

A sensitive microphone cannot withstand currents greater than 0.05 A when connected across a thermocouple of emf 8.5 m V , the current in a very low resistance ammeter placed in series in the circuit reads 34 mA. What is the resistance of the microphone?

Name the energy transfers which occur when : (a) an electric bell rings (b) someone speaks into a microphone (c) there is a picture on a television screen (d) a torch is on

A small speaker has a capacity of power 3 W. A microphone is placed at distance 2 m from the speaker. Fine the displacement amplitude of particles of air near to microphone. The frequenct of sound emitted bt speaker is 1.0 KHz (Density of air = 1.2 kg//m^(3) and speed of sound in air = 330 m/s)