String A, of length 60 cm, is stretched under a tension of 36 N and has linear mass…

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

String A, of length 60 cm, is stretched under a tension of 36 N and has linear mass density

4.0\times10^{-4}

kg m

^{-1}

. String B, made of the same material, has length 40 cm and is stretched under an unknown tension

T_B

. If the second harmonic of string A is in unison with the third harmonic of string B, what is

T_B

? (a)

12\;\text{N}

(b)

16\;\text{N}

(c)

7.1\;\text{N}

(d)

4.7\;\text{N}