NEET Physics Waves Questions Solved

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Three similar wires of frequency n1, n2 and n3 are joined to make one wire. Its frequency will be

(1) n=n1+n2+n3

(2) 1n=1n1+1n2+1n3

(3) 1n=1n1+1n2+1n3

(4) 1n1=1n12+1n22+1n32

(2) n=12lTmn1l1=n2l2=n3l3=k

l1+l2+l3=lkn1+kn2+kn3=kn

1n=1n1+1n2+1n3+........

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