In the zone melting method _____________ of the charge is melted at any one time. Fill up the correct option for the blank space from the choices given below.
A
Anionic part
B
Solid part
C
Small part
D
Large part
Answer:
The correct option is C. Small part
Note
In zone melting method the thermal profile through the furnace is such that only a small part of the charge is melted at any one time. Initially, that part of the charge in contact with the seed crystal is melted. As the boat is pulled through the furnace, oriented solidification onto the seed occurs and at the same time, more of the charge melts.