Two tones of frequencies n₁ and n₂ are sounded together. The beats can be heard distinctly when(a) 10 < (n₁ – n₂) < 20(b) 5 < (n₁ – n₂) > 20(c) 5 < (n₁ – n₂) < 20(d) 0 < (n₁ – n₂) < 10
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10 <(n1-n2)< 20 is u r ans
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number a............
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