Home Physics Wave and Sound NTA Abhiyas Question The total length of a sonometer wire fixed b…
Physics Wave and Sound NTA Abhiyas Question MCQ (Single Correct)

The total length of a sonometer wire fixed between two bridges is 110 cm. Now, two more bridges are placed to divide the length of the wire in the ratio 6:3:2. If the tension in the wire is 400 N and the mass per unit length of the wire is 0.01 kg m -1 , then the minimum common frequency with which all the three parts can vibrate, is

A
1000 Hz
B
1100 Hz
C
100 Hz
D
110 Hz

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The correct answer is:
A

1000 Hz

The frequency in any mode for a segment is constant no of loops length of the segment so, no of loops are in the ratio 6:3:2 hence total loops
The string is divided in part such that for minimum frequency, the wavelength is maximum

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