A film of soap solution is formed on a loop frame loop of 6.28 cm long thread is gently put on the film and the film is broken with a needle inside the loop. the thread loop takes the shape of a circle. Find the tension in the thread. Surface tension of soap solution = 0.030 N/m.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(6 × 10 –4 N)
Sol. 2T sin θ = s (R. 2 θ ) x 2 for small θ sin θ = θ
T = 2SR = 2 × .030 × 
= 6 × 10 – 4 N
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