railway RRB Technician Grade 3 Mock Test 2024 General Science Physics Wave

শব্দ তরঙ্গের কম্পাঙ্ক v এবং সময়কাল T-এর মধ্যে সম্পর্ক কী?

1
v = T
2
v = 1 / T2
3
v = 1/T
4
v = 1 / √T
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