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AC Sonometer
 1) What type of waves is produced by a stretched string under vibration? Transverse waves. Longitudinal waves. Both longitudinal and transverse waves. None of these.

 2) Which equation is used for calculating the liner density of the wire? m = ¾πr²ρ m = πr²ρl m = πr²ρ m = πr²l

 3) What happens to the frequency of the wire when the resonating length of the wire increases? Decreases. Increases. No change in the frequency. Either increases or decreases.

 4) What does it indicates when the paper rider on the wire falls off during the ac sonometer experiment? The frequency of the wire between the bridges becomes less than that of a.c main. The frequency of the wire between the bridges becomes greater than that of a.c main. The frequency of the wire between the bridges becomes equal to that of a.c main. The frequency of the wire between the bridges becomes zero.

5)Which is the correct equation for calculating the frequency of a.c main?

 6) Why do we use a step–down transformer in the a.c sonometer experiment? To decrease the voltage of a.c mains to 6 V. To maintain the voltage of a.c mains as 220 V. To increase the voltage of a.c mains to 300 V. To increase the voltage of a.c mains >300 V.

 7) Which material is used for a sonometer wire? Brass Cast iron Steel Iron

 8) Which of the following is a factor on which the frequency of a stretched string depends? Resonating length of the string. Mass of the suspended weight. Linear density of the material of the wire. All of these.

 9) What happens to the resonating length of the stretched string when the mass of the slotted weight increases? Resonating length decreases. Resonating length increases. Resonating length remains the same. None of these.

 10) Which is the equation used for calculating the tension of a stretched string? T =- 2Mg T = Mg T= Mg² T = √Mg