Teaching Bihar D.El.Ed Mock Test Series 2024-25 General Science Physics Wave

SONAR ରେ ଆମେ ବ୍ୟବହାର କରୁ 

1
ଇନଫ୍ରାସୋନିକ୍ ତରଙ୍ଗ 
2
ଅଲଟ୍ରାସୋନିକ୍ ତରଙ୍ଗ 
3
ଶ୍ରବଣୀୟ ଶବ୍ଦ ତରଙ୍ଗ
4
ରେଡିଓ ତରଙ୍ଗ 
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