Fix the string vibrator to a metal stand. Then take the string and attach one en
ID: 1656057 • Letter: F
Question
Fix the string vibrator to a metal stand. Then take the string and attach one end to the string vibrator. Connect the AC power supply to the string vibrator which will vibrate the string at 60 Hold the free end of the string as shown in the figure below and slowly increase the tension by pulling it away. Observe the standing wave patterns that occur as you stretch the string. 3. What happens to the number of antinodes as you increase the tension? What happens to the wavelength as you increase the tension? Refer back to the figure on the first page to see how wavelength is related to nodes and antinodes. 4. 5. Does the frequency of the standing wave change as you increase the tension? 6. what is the justification to your answer in #5?Explanation / Answer
Given the string is vibrating at f = 60 Hz
3. speed of wave on the string, v = sqroot(T/mu) [ where T is tension and mu is mass per unit length]
wavelength of wave on string = lambda = v/f
as f is source dependent, constant, and on increasing T, v increases, so lambda increases too
hence number of antinodes decreases with increase in Tension
4. increasing tension decreases wavelength ( from previous part)
5. Frequency is a source dependent property, so it does not change with change in tension
6. Because frequency is source dependent property , hence it will not change
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