बॉल पेन किस सिद्धांत पर का� – McqOptions

MCQOPTIONS

1.	बॉल पेन किस सिद्धांत पर काम करता है -
A.	श्यानता
B.	बॉयल का नियम
C.	गुरुत्वीय बल
D.	पृष्ठीय तनाव
Answer» D. पृष्ठीय तनाव

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