Question

Figure shows the shape of part of a long string in which transverse waves are produced by attaching one end of the string to tuning fork of frequency $250\, Hz$. What is the velocity of the waves?

• A. $1.0 \,m \,s ^{-1}$
• B. $1.5 \,m \,s ^{-1}$
• C. $2.0\, m\, s ^{-1}$
• D. $2.5 \,m \,s ^{-1}$

Answer 1

Answer: (A)

It is clear from the figure that the wavelength
$\lambda=0.4 \,cm .$ Now $v=250 \,Hz$
$\therefore \,\,\,\,v=v \lambda=250 \times 0.4=100 \,cm\, s ^{-1}=1 \,m \,s ^{-1}$