Initial length of wire, l1=0.4m Frequency of stretched wire, f1=250‌vib∕s=250‌Hz Final length of wire after stretching, l2‌=l1+0.1m ‌=0.4+0.1=0.5m Initial force (tension), T1=T Final force (tension), T2=‌
T
4
We know that, frequency of wave produced due to stretched string. f=‌