How do you find the frequency of AC main using Sonometer?

How do you find the frequency of AC main using Sonometer?

Move wooden bridges P, P outward to include maximum length of wire (AB) between them. Decrease the length of the wire by moving both the bridges equally inwardly. Go on decreasing the length till sonometer wire starts vibrating (a sound is heard). Adjust the length for maximum amplitude of vibration, (maximum sound).

What is the frequency of AC mains?

India and most European countries use the electricity which has the frequency of AC mains as 50Hz.

Why external magnetic field is used in Sonometer experiment?

A horse shoe magnet is placed at the middle of the sonometer wire so that the magnetic field is applied perpendicular to the sonometer wire in a horizontal plane. So a force will act on the conductor in a direction perpendicular to both the field and the direction of current.

How do you calculate AC supply frequency?

The frequency of the voltage is symbolized by f and given by f = 1/T. In terms of ω, f = ω/2π, in hertz.

What is AC Sonometer?

An A.C sonometer is an apparatus by which the transverse vibrations of strings can be studied. It consists of two bridges, near the ends, one horse shoe magnet at the middle and at one end is a pulley.

What is the frequency of AC mains and its value in India?

50 Hz
Frequency of Alternating current in India is 50 Hz. India has an AC supply of 50 Hz/ 220 volts. While the USA and many of the European countries have 60 Hz/110 volts supply.

How do you calculate Sonometer?

Frequency of vibration of a stretched string: The frequency is calculated using the equation, L = resonating length. T = tension at the string. m = mass/unit length of the wire.

What is Sonometer used for?

A sonometer is a diagnostic instrument used to measure the tension, frequency or density of vibrations. They are used in medical settings to test both hearing and bone density.

What is an AC Sonometer?

On which principle does the AC Sonometer work?

A Sonometer is a device based on the principle of Resonance. It is used to verify the laws of vibration of stretched string and also to determine the frequency of a tuning fork.

What is the formula of AC?

Key Equations

AC voltage v=V0sinωt
AC current i=I0sinωt
capacitive reactance V0I0=1ωC=XC
rms voltage Vrms=V0√2
rms current Irms=I0√2

How to find the frequency of AC mains using sonometer?

To find the frequency of the A.C. mains with a sonometer. Same as in Experiment 8 except a separate horse shoe magnet and a separate step down transformer. Let a loaded stretched soft iron wire have resonant length l 1 for the main frequency.

How can A sonometer measure the frequency of sound?

By knowing the linear density, m, of sxperiment wire, the frequency of A. Select the type of AC supply from the drop down list. It is because the electromagnet is magnetised twice during one cycle of alternating current. Therefore, a sonometer is an instrument which measures the frequency of sound.

Which instrument is used to determine the frequency of alternating current?

A sonometer is used to determine the frequency of alternating current. A step down transformer is used for the determination of frequency of A.C. because the voltage of the A.C. mains is 220V, which is dangerous.

How to use an electromagnet as A sonometer?

Let the alternating current have frequency v so that the frequency of magnetisation of the electromagnet (V E) becomes 2v. Let a loaded stretched soft iron wire have resonant length l 1 with the electromagnet. Let a tuning fork of frequency V T have resonant length l 2. Place the sonometer on the table as shown in figure.