Answer the following questions related to electric fuses used in domestic circuits:
a. (i) Define an electric fuse.
b. (ii) State the basic principle on which an electric fuse works.
c. (iii) List any two characteristics required of the material used for a fuse wire.
d. (iv) Where is the fuse connected in a household circuit and why?
e. (v) Write the standard circuit-symbol for a fuse used in schematic diagrams.