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किसी स्प्रे - पम्प की बेलनाकार नली की त्रिज्या R है । इस नली के सिरे पर n सूक्ष्म छिद्र है, जिनमे प्रत्येक की त्रिज्या r है, यदि नली में द्रव की चाल v है, तो इन छिद्रो से बाहर निकलते हुए द्रव की चाल होगी :
A. `(vR^(2))/(nr^(2))`
B. `(vR^(2))/(n^(3)r^(2))`
C. `(v^(2)R)/(nr)`
D. `(vR^(2))/(n^(2)r^(2))`.

1 Answer

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Correct Answer - A
Av = नियतांक
`piR^(2)v=npir^(2)v_(1)`
`v_(1)=(vR^(2))/(nr^(2))`

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