Question

सोनोमीटर की सहायता से a.c. मेंस की आवृत्ति ज्ञात करें
Find the frequency of an mains with the heln af​

Answer 1

A sonometer is a diagnostic instrument and the frequency of A.C. mains is 50 HZ

Explanation:

• sonometer is used to measure the tension, frequency or density of vibrations
• frequency of sonometer wire is 2m. being double the frequency of ac mains
• when the altering current of definite frequency passes through the wire there will be an interaction between the magnetic field and the current carrying conductor.
• the length 'l' of the sonometer wire vibrates with maximum amplitude.
• the frequency of the applied ac is equal to the natural frequency of the wire.