A vibrating source generates a harmonic wave on a string underconstant tension.

Question

A vibrating source generates a harmonic wave on a string underconstant tension. If the power delivered to the string is doubled,by what factor does the amplitude change?

A)4
B)1.41
C)no change
D)0.5 Hint: The power is proportional to vA2. If thetension is constant the speed is constant. Therefore todouble the power we have to double A2.

A)4
B)1.41
C)no change
D)0.5 Hint: The power is proportional to vA2. If thetension is constant the speed is constant. Therefore todouble the power we have to double A2. Hint: The power is proportional to vA2. If thetension is constant the speed is constant. Therefore todouble the power we have to double A2.

Explanation / Answer

A)4
B)1.41
C)no change
D)0.5 optionA is correct.
The power is proportional to vA2. If thetension is constant the speed is constant. Therefore todouble the power we have to double A2. optionA is correct.
The power is proportional to vA2. If thetension is constant the speed is constant. Therefore todouble the power we have to double A2.

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