Wave Speed on a String — Practice Quiz

Question 1

A string has T = 64 N, μ = 0.01 kg/m. Wave speed:

Accepted Answer

80 m/s

Answer

64 m/s

Answer

8 m/s

Answer

6400 m/s

Question 2

If tension is doubled and μ kept same, wave speed:

Accepted Answer

Multiplied by √2

Answer

Doubles

Answer

Halves

Answer

Unchanged

Question 3

Two strings: μ₁ = 0.02 kg/m, μ₂ = 0.08 kg/m (same T). Speed ratio v₁/v₂:

Accepted Answer

2

Answer

1

Answer

0.5

Answer

4

Question 4

Power transmitted by a sinusoidal wave on a string:

Accepted Answer

Quadratic in A and ω

Answer

Linear in A

Answer

Proportional to f only

Answer

Independent of A

Question 5

Thicker guitar strings produce LOWER notes because:

Accepted Answer

Larger μ ⇒ slower v ⇒ lower fundamental f

Answer

Higher T

Answer

Same v but different A

Answer

Quantum effect