A string of length L is under tension,and the speed of a wave in the string is v.What will be the speed of a wave in the string if the length is increased to 2L but with no change in the mass or tension?
A)v/2
B)v/ $\sqrt { 2 }$
C)v $\sqrt { 2 }$
D)2v
E)4v

Question

Quizplus · Accepted Answer

The speed of a wave in a string depends on the tension and the mass per unit length (linear density) of the string, not on its length. Therefore, doubling the length of the string without changing its mass or tension does not affect the speed of the wave.

A String of Length L Is Under Tension,and the Speed 2\sqrt { 2 }2​

A String of Length L Is Under Tension,and the Speed $\sqrt { 2 }$