Question

how do you find the electric wire concealed in the wall or a ceiling roof​

Answer 1

The electric wire concealed in a wall or a ceiling roof can be found with the help of a magnetic needle.

• A magnetic needle or a compass is a magnet that is light weight and on a free pivot which is rotating. It enables the needle to react better to nearby magnetic fields.
• A magnetic needle or a plotting compass can be used to detect the current wire concealed inside a wall.  Due to the presence of current carrying wire the magnetic needle will show deflection.