6. Investigating Resonance

Question 1

What factors affect resonance Frequency?

Answer 1

Length, Mass per unit length and tension

Question 2

How does Length affect Resonant Frequency?

Answer 2

The longer the string, the lower the resonant frequency, this is because doing this increases the wavelength, this can be seen in the equation as c = fλ, and as c is constant and λ is increased, f will decrease.

Question 3

How does an increase in Mass Per Unit Length affect the Resonant Frequency

Answer 3

The greater the Mass per unit length, the lower the resonant frequency, this is because waves travel more slowly down the string, and as λ is constant, and c is decreasing, f will also decrease.

Question 4

How does decreasing the Tension in the string affect the resonant frequency?

Answer 4

decreasing the tension decreases the resonant frequency, this is because waves travel more slowly down a loose string.

Question 5

How can you calculate the resonant frequency?

Answer 5

The frequency in Hz can be calculated by multiplying 1/(2*length) by the square root of tension divided by mass per unit length.