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  4. Number of beats between A and B is 5 and between B and C are 3. Beat frequency between A and C may be

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Q. Number of beats between $A$ and $B$ is $5$ and between $B$ and $C$ are $3$. Beat frequency between $A$ and $C$ may be

Delhi UMET/DPMTDelhi UMET/DPMT 2008Electromagnetic Waves

Solution:

Number of beats between $A$ and $B , n_{1}=5$
Number of beats between $B$ and $C , n_{2}=3$
Hence, number of beats between $A$ and $C$,
$n_{3}=n_{1}-n_{2}$
$=5-3$
$=2$