Practice Frequency in Physics
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
The number of complete wave cycles that pass a fixed point per second, measured in hertz (Hz).
How many times something vibrates per second—high frequency means very rapid vibration.
Example 1
easyA pendulum completes 20 swings in 40 \text{ s}. What is its frequency and period?
Example 2
mediumA radio station broadcasts at 100 \text{ MHz}. What is the wavelength of the radio wave? Use c = 3 \times 10^8 \text{ m/s}.
Example 3
easyA wave has a period of 0.02 \text{ s}. What is its frequency?
Example 4
mediumA guitar string vibrates at a fundamental frequency of 330 \text{ Hz}. What are the frequencies of the second and third harmonics? If the string length is 0.65 \text{ m}, what is the wavelength of the fundamental?