question_answer

Equation   of travelling wave   on   a stretched string of linear density 5 g/m is  where distance and time are measured in SI units. The tension in the string is- [JEE Main 11-Jan-2019 Morning]

A) 10 N

B) 7.5 N

C) 5 N

D) 12.5 N

Correct Answer: D

Solution :

[d] The given wave is

Compare with standard wave equation

The velocity of travelling wave

...(i)

Also, velocity of wave on stretched string is

...(ii)

Using (i) and (ii),