A sensitive microphone cannot withstand currents greater than 0.05 A when connected
Channel: Doubtnut
Date: 2020-08-23

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?