defence exam BSF Head Constable (RO/RM) Mock Test 2023 Physics Waves Sources of Musical Sound

ନିମ୍ନଲିଖିତ ମଧ୍ୟରୁ କେଉଁଟି ଧ୍ୱନି ତରଙ୍ଗର ବୈଶିଷ୍ଟ୍ୟ ନୁହେଁ?

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ଆମ୍ପ୍ଲିଟୁଡ୍ 
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ତରଙ୍ଗ ଦୈର୍ଘ୍ୟ
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ବାରମ୍ୱାରତା
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ଔଜଲ୍ୟତା
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