A string of length $$0.4$$ m and mass $$10$$−$$2$$ 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 Δt. The minimum value of Δt which allows constructive interference between successive pulses is

Question

A string of length $$0.4$$ m and mass $$10$$−$$2$$ 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 Δt. The minimum value of Δt which allows constructive interference between successive pulses is

Infinity Learn · Accepted Answer

For string,  $$MassLength=m=10$$−$$20.4=2.5$$×$$10$$−$$2kg/m$$∴ Velocity  $$v=Tm=162.5$$×$$10$$−$$2=8m/sFor$$ constructive interference between successive pulses.       Δ$$tmin=2lv=2(0.4)8=0.1sec(After$$ two reflections, the wave pulse is in same phase as it was produced since in one reflection it’s phase changes by π, and If at this moment next identical pulse is produced, then  constructive interference will be obtained.

A string of length 0.4 m and mass $10^{- 2} kg$ 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 $Δt$ . The minimum value of $Δt$ which allows constructive interference between successive pulses is

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A string of length 0.4 m and mass 10−2 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 Δt. The minimum value of Δt which allows constructive interference between successive pulses is

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A string of length 0.4 m and mass $10^{- 2} kg$ 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 $Δt$ . The minimum value of $Δt$ which allows constructive interference between successive pulses is