1.

The frequency of vibration of a string depends of on, (i) tension in the string (ii) mass per unit length of string, (iii) vibrating length of the string. Establish dimensionally the relation for frequency.

Answer»

SOLUTION :`npropI^(a)T^(B)m^(c),[I]=M^(0)L^(1)T^(0)`
`[T]=M^(1)L^(1)T^(-2)` (force)
`[M]=M^(1)L^(-1)T^(0)`
`[M^(0)L^(0)T^(-1)]=[M^(0)L^(1)T^(0)]^(a)[M^(1)L^(1)T^(-2)]^(b)[M^(1)L^(-1)T^(0)]^(c)`
`b + c = 0`
`a + b – c = 0`
`-2b=-1impliesb=(1)/(2)`
`c=-(1)/(2)a=1`
`nprop(1)/(l)sqrt((T)/(m))`


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