WorksheetsDivya
Total questions: 10
Worksheet time: 10mins
Loudspeaker is ............................
transducer
transmitter
radio emitter
radio transmitter
Transducer converts .......................................
electrical signal of audio frequency into sound waves of same frequency
mechanical to electrical
sound waves signal to electrical audio signal
electrical to mechanical
SNR is ....................
signal o/p to o/p of noise in absence of signal
o/p signal to i/p noise signal
o/p sound signal frequency to i/p sound signal frequency
o/p frequency to i/p frequency
Frequency response of loudspeaker is ...............................
±30dB for range of 20kHz to 30kHz
± 1dB for range of frequency 16kHz to 20kHz
± 1dB for range of 16kHz to 20kHz
± 20dB for range of 10kHz to 15kHz
Mention the dynamic loudspeaker frequency response better than .................
20Hz TO 40Hz
40Hz to 5000Hz
40Hz to 5500Hz
20Hz to 40Hz
Force on coil is formulated as ....................
F=B sin α i
F= tan α li
F= Bli sin α
F= sin α
Which type of crystal is used in microphone......................
Rochelle salt
Rochelle and quartz
quartz
Sodium
What is the frequency allocated for communication on worksites
174.6 and 175.95MHz
174.6 and 174.95 MHz
173.6 and 173.64 MHz
17.1 and 18.65MHz
The narrow bandwidth specification for wireless microphone is .............................
+75kHz
+20kHz
+50kHz
15kHz
The o/p power of transmitter must not exceed ................... for narrow and ...................... for wide band .
10mW and 50mW
20W and 25W
50mW and 10mW
50W and 10W
