JAMB - Physics (1987 - No. 26)
When the length I of a piece of wire under constant tension is varied, the relationship of the frequency of the vibration f\(\alpha\)/ is
f\(\alpha\)/
f\(\alpha \frac{1}{I^2}\)
f \(\alpha\sqrt I\)
f\(\alpha \frac{1}{1}\)
Giải thích
F = \(\frac{1}{2L}\sqrt\frac{T}{m}\)