JAMB - Physics (1998 - No. 25)
A steel wire of length 0.50m is stretched between two fixed points and its fundamental frequency is 200Hz. The speed of the wave in the wire is
100ms-1
120ms-1
200ms-1
250ms-1
Explicaţie
In strings, \(\lambda\) = 2L
V = F\(\lambda\)
= 200 x 2 x 0.5
= 200ms-1
V = F\(\lambda\)
= 200 x 2 x 0.5
= 200ms-1