Sound WavesHard

Question

String I and II have identical lengths and linear mass densities, but string I is under greater tension than string II. The accompanying figure shows four different situations, A to D, in which standing wave patterns exist on the two strings. In which situation it is possible that strings I and II are oscillating at the same resonant frequency ?

Options

A.String I
String II
B.String I
String II
C.String I 
String II
D.String I 
String II

Solution

Since tension in I > tension in II ⇒ VI > VII Thus, for same frequency, λI > λII

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