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Q.

A transverse wave travels on a taut steel wire with a velocity of  ν when tension in it is  2.06x104N. When the tension is changed to T, the velocity changed to ν/2 . The value of T is close to :

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a

5.15x103N

b

10.2x102N

c

2.50x104N

d

30.5x104N

answer is A.

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Detailed Solution

Speed of wave on string, v∝T         ​v1v2=T1T2⇒vv/2=2.06×104T         ​⇒T=2.06×1044N=0.515×104N⇒T=5.15x103N
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