Melde Experiment Aim:

To determine the frequency of the vibrator using Melde experiment What is the frequency of AC in Melde’s experiment ? It is 50 Hz in India.

Viva Questions Melde experiment

1Q. What do you mean by progressive waves or standing waves?

2Q. Are longitudinal and Transverse waves are progressive waves?

3Q. How Stationary waveforms?

4Q. What are nodes and antinodes in a stationary wave?

5Q. Do stationary wave and standing wave concepts are the same?

6Q. What is the distance between any two nodes and antinodes in terms of wavelength? How much is that?

7Q. What is the relation between the velocity of the wave, tension and linear density of thread?

8Q. What is the formula to calculate the frequency of the vibrator?

9Q. Can you determine the frequency of AC by using the vibrator in the Melde’s Experiment?

10Q. What is the unit of frequency?

11Q. What do you understand about the resonance?

12Q. What is the Alternating Current Frequency in India?

13Q. Does AC frequency is the same in India and USA?

14Q. Does variation in mass on the pan can vary the wavelength of standing wave?

15Q. What are the main precautions of this Melde’s experiment, can you use the thin wire of steel instead of thread in Melde experiment?

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This experiment includes a solenoid, in the centre, we put an iron rod. When current passes through the coils it produces the magnetic field. The polarity of this magnetic field changes frequently and it is obvious, change into magnetization of the rod.

When its polarity changes it is attracted and repelled by a permanent magnetic piece. When this happens you can observe the vibration in the rod. Now, these vibrations depend on the frequency of the applied alternating current.

By this way, you determine the frequency of the alternating current.

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