why is a copper wire used in a sonometer to find the frequency of A.C mains?plz i hv my board practicals 2morow.friends and xperts plz help
We use a non -magnetic i.e like copper wire in the sonometer so that it doesn't get affected by a permanent shoe-magnet. But if we use an iron or steel wire, it will be attracted by horse-shoe magnet and will not be able to vibrate under the action of electric current and magnetic field.