InterviewSolution
Saved Bookmarks
| 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))` |
|