Video narration
Garam chai mein rakha steel ka chammach, uska handle bhi garam kyun ho jata hai? Chai chalate samay, chammach ka ek sira chai mein rehta hai aur handle bahar. Chammach garmi paida nahi karta; garam chai steel ko garam karti hai. Phir garmi steel mein dheere-dheere handle tak pahunchti hai. Jitni der chammach chai mein rahega, handle utna garam ho sakta hai. Isliye pakadne se pehle saavdhan raho. Chai ki garmi steel se handle tak pahunchna conduction hai, yani thos mein garmi ka phailna.