Question

write the condition required for a circuit to be a closed circuit

Answer 1

A closed circuit condition exists wherein the external flux path of a permanent magnet is confined within high permeability material. In order to do useful work, a so-called closed circuit always involves at least one air gap where the useful performance can be carried out.

Answer 2

the wires should be of  conductor(copper or something). the switch should be on, the appliances' fuse should not be blown out.