A string of length 0.4 m and mass 1 0 − 2 kg is tightly clamped at its ends. The tension in the string is 1.6 N. Identical wave pulses are produced at one end at equal intervals of time Δ t . The mini

Question

A string of length 0.4 m and mass 1 0 − 2 kg is tightly clamped at its ends. The tension in the string is 1.6 N. Identical wave pulses are produced at one end at equal intervals of time Δ t . The minimum value of Δ t which allows constructive interference between successive pulses is:

TestHub · Accepted Answer

μ = 0.01/0.4 = 0.025 kg/m, v = 1.6/0.025 ​ = 8 m/s. A pulse returns after 2 L / v = 0.8/8 = 0.1 s, so Δ t min ​ = 0.10 s.

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