ध्वनि के आयाम को मापने की इ� – McqOptions

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1.	ध्वनि के आयाम को मापने की इकाई क्या है?
A.	डेसिबल
B.	कूलम्ब
C.	गुंजन
D.	साइकिल
Answer» B. कूलम्ब

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