Question

Two frequencies generate a beat frequency of 5 hz. One frequency is 2,789 hz. What is the other frequency?

Answer 1

Answer:

f1 =2789 Hz

we need to find f2

beat frequency = | f1-f2 |

5=| 2789-f2 |

2789-f2 = -5 or +5         modulus of negative and positive both result positive so,we have to consider both cases.

2789-f2 = -5

f2=2794 Hz

2789-f2 = 5

f2=2784Hz

so, other frequency is 2784 Hz or 2794 Hz

Explanation: