Question

A certain strings will resonate to several frequencies , the lowest of which is $200$cps.what are the next three higher frequencies to which it resonates?

• A. $400,600,800$
• B. $300,400,500$
• C. $100,150,200$
• D. $200,250,300$

Answer 1

The correct option is A $400,600,800$

Given, The Lowest frequency is $200cps$

Let $f$ resonant the fundamental frequency, then the next higher frequency is: $2f,3f,4f$

$2\times 200=400cps,3\times 200=600,4\times 200=800cps$