alleryThe beat frequency produced by two waves equals which combination of their frequencies?
ATheir dividend
BTheir diameter
CTheir difference
DTheir doubling
Answer & Solution
Correct answer: C. Their difference
1. Two slightly different frequencies together produce a slow throbbing.
2. The throb rate depends on how far apart the two frequencies are.
3. The beat frequency is given by the first frequency minus the second.
4. So the answer is their difference.
_Source: syllabus Physics Part II, Ch 14 'Waves'_
Keep practising Waves
Browse all Waves questions for AP Intermediate 1st Year, or explore more Physics topics.
Related questions
Waves that need a medium to travel through are called:Type the wave numbersFinish the sentenceOne word is wrongNode or antinodeTransverse or longitudinalLiquids and solids generally have a speed of sound compared with gases that is:How does the Newton formula result for the speed of sound in air compare with experiment?