Question

A stretched wire vibrating in fundamental mode is in unison with a tuning fork . keeping the same tension , the length of the wire between the bridges is doubled.The tuning fork can still be in resonance with the wire . Provided the wire now vibrates in ____ segments

Answer 1

Explanation:

For the given problem ,

T−−√l=constant

or T∝l2

If l is to be doubled , T would be quadrupled.

Answer 2

Answer:

Let the initial length of wire is l.

=

2l

v

=+ ---------------(1)

Now, new length =2l.

let it vibrates in n segments

=n.

2(2l)

v

=+

=n.

4l

v

=

2l

v

=n=2