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Q.

Spacing between two successive nodes in a standing wave on a string is x. If frequency of the standing wave is kept unchanged but tension in the string is doubled, then new spacing between successive nodes will become:

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a

x2

b

x2

c

2x

d

2x

answer is B.

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Detailed Solution

Spacing between successive nodes λ2, 

Using v=fλ

λ∝v∝Tμ

If tension becomes 2 times , then wavelength (or spacing) becomes 2 times.

 

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