When temreture increases, the frequency of a tuning fork

Options

A. (a) increases
B. (b) decreases
C. (c ) remains same
D. (d) increases or decreases depending on the material

Answer

B

Explanation

(b) KEY CONCEPT : the frequency of a tuning fork is given by the expression
`f = (m^(2)K)/(4sqrt(3)pil^(2))sqrt((Y)/(rho)`
As temperature increases, `l` increases and therefore `f` decreases.