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IUT_14-15
HSC - পদার্থ বিজ্ঞান ১ম পত্র
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অধ্যায়-০৯ঃ তরঙ্গ
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All Topics
If the sound level is increased by
3
d
B
3dB
3
d
B
, what is the corresponding change in the intensity level?
A.
Doubled
B.
3 times
C.
2.5 times
D.
1.5 times
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