Question

The extension in a string, obeying Hooke's law, is x. The
speed of sound in the stretched string is v. If the extension in the string is increased to 1.5x, the speed of sound
will be
(A) 1.22 v
(B) 0.61 v
(C)1.50 v
(D) 0.75 v​

Answer 1

Answer:

(c)1.50v

Explanation:

speed is directly proportional to extension

Answer 2

Answer:

1.22v

Explanation:

Speed of sound V=

μ

T

V∝

T

Also

So T∝x

V

1

V

2

=

x

1.5x

V

2

=

1.5

V=1.22V