Question

A hummingbird beats its wings $3,300$ times per minute. Find out the frequency produced by the bird?

• A. $0.003Hz$
• B. $0.018Hz$
• C. $6Hz$
• D. $55Hz$
• E. $3300Hz$

Answer 1

The correct option is D $55Hz$

Beat frequency is given by, number of beats per second,

in the given case ,

frequency-

$f=3300\text{beats per minute}$

$\Rightarrow f=\frac{3300}{60}\text{beats per second}$

$\Rightarrow f=55Hz$