Question

find the friquency of a.c. mains with the help of a sonometer
​

Answer 1

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).

please mark as brainlist I need it

Answer 2

Answer:

Here is the complete Explanation

Explanation:

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).

The standard current used in the U.S. is 60 cycles per second (i.e. a frequency of 60 Hz); in Europe and most other parts of the world it is 50 cycles per second (i.e. a frequency of 50 Hz.