**Question 51 (Textile Technology & Fibre Science)**

In a vibroscope, a cotton fibre of 25 mm length is clamped at one end, led over a knife-edge support, tensioned by a weight of 350 mg, and is inclined to vibrate at a fundamental resonant frequency of 2.6 kHz. The linear density of the fibre (in tex), accurate to two decimal places, is __**0.19 to 0.21**__.

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**Given in the question-**

Fibre length(**l**)=**25mm**

Fibre weight(**W**)=**350mg**

Resonant frequency(**f**)=**2.6kHz**

Linear density of fibre(**in tex**)=**?****Formula**:**By unitary rule**:

1 meter length have=0.000207 gm

1000 meter length have=0.000207*1000

**Tex=0.20 ** (Answer)